Exploring possibilities
Just taking a few moments here to try to address UT, and bring possibilities into the larger context of the thread:
In
Morgoth's ring,
Tolkien says, regarding
Saruman:
"
Finally, there is a cogent point though horrible to relate. It became clear in time that undoubted Men could under the domination of Morgoth or his agents in a few generations be reduced almost to the Orc-level of mind and habits; and then they would or could be made to mate with Orcs, producing new breeds, often larger and more cunning. There is no doubt that long afterwards, in the Third Age, Saruman rediscovered this, or learned of it in lore, and in his lust for mastery committed this, his wickedest deed: interbreeding of Orcs and Men, producing both Men-orcs large and cunning, and Orc-men treacherous and vile..."
I read from this passage that Saruman created two reasonably distinct offspring from his breeding program, men-orcs and orc-men. I would say that orc-men were mostly
mannish, and they were probably useful as spies since they could blend in with men (think
Bree and the
scouring of the Shire). The other variety would be men-orcs, probably mostly
orcish, who would be more disciplined than regular orcs, and would be sun-tolerant (if that did not already exist). Now, regarding the often-quoted passage from UT:
"
In its van were some Dunlending horsemen and a great pack of the dreadful Orcish wolfriders, feared by horses. Behind them came two battalions of the fierce Uruks... The garrison of the east bank, surprised by the sudden assault of the massed Uruks was swept away... they were driven from the Fords... with the Uruks in pursuit".
"As soon as the enemy had gained possession of the eastern end of the Fords there appeard a company of men or orc-men (evidently dispatched for the purpose), ferocious, mail-clad, and armed with axes... Theodred fell, hewn down by a great orc-man."
Notice that the distinction here is the uruks and orc-men. Man-orcs are not mentioned, but uruks are. If man-orcs were bred from uruks (what other variety of
orc would Saruman use, the whimpy kind?), it would (in my opinion) be fair to refer to them as uruks. If Tolkien distinguished between orc-men and men-orcs in Morgoth's ring, it would be fair to do so now. I believe this is exactly what he is doing here- the uruks are the 'men-orcs', and the orc-men are, well, the orc-men.
Are there passages in the LotR proper where uruks are equated with man-orcs? Yes- in
Helm's Deep. Two passages follow:
"
But these creatures of Isengard, these half-orcs and goblin-men that the foul craft of Saruman has bred, they will not quail at the sun."
and
"
The Orcs yelled and jeered. 'Come down! Come down!' they cried. 'If you wish to speak to us, come down! Bring out your king! We are the fighting Uruk-hai. We will fetch him from his hole, if he does not come down. Bring out your skulking king!'
" 'The king stays or comes at his own will,' said Aragorn.
" 'Then what are you doing here?' they answered. 'Why do you look out? Do you wish to see the greatness of our army? We are the fighting Uruk-hai.'
" 'I looked out to see the dawn,' said Aragorn.
" 'What of the dawn?' they jeered. 'We are the Uruk-hai: we do not stop the fight for night or day, for fair weather or for storm. .... "
Both of these passages are in reference to (or spoken by) the troops of Saruman. In one case we have a character in the story refering to Saruman's troops as half-breeds who can withstand the light of day, and in context it seems to be the peculiar property of half-breed orcs that they can withstand sunlight. It could be argued that
Gamling is wrong -the creatures of Saruman aren't half breeds but Uruks who could ordinarily withstand sunlight. I would object by noting that Aragorn is right there. Aragorn definitely knows all about Uruks- he fought in Southern
Gondor in his youth, he claims to know more about orc-kind than any man in
Middle-Earth, and he recently fought Uruks in
Moria (
Gandalf gave the positive ID). The only way that Gamling would be wrong is if Tolkien were intentionally trying to mislead the reader by having Gamling speak out of ignorance, and then choosing to have Aragorn remain silent. I don't see this as Tolkien's style- in The
Council of Elrond several characters speak in ignorance of
the ring, and then they are always corrected by the more knowledgeable council members present. Given this line of reasoning it is hard to argue that Gamling is wrong, and hence we have half-breeds of Isengard with the peculiar property that they can fight in the sun, which apparently was not a development that came along with the uruks.
Now, turning to the statements of the orcs, they say that both they are the Uruk-hai, and that they do not quail in the sunlight. There is no direct statement made here that they are orc-men or men-orcs. However, we can refer back to Gamling's statement. If 'normal' uruks could withstand the light of day, then Gamling would hardly need to narrate the fact that these orcs could withstand the light of day. Uruks were first seen in TA 2475,
Rohan was established by
Eorl in TA 2510. The whole history of Rohan occurs within the time that Uruks had been attacking Gondor. It would not only be reasonable to assume that Gamling was aware of Uruks, it would be unreasonable to assume that Gamling did not know of Uruks. By this line of logic I will now contend that the Uruk-hai are the same creatures that Gamling (and
Treebeard, Aragorn, and Tolkien in Morgoth's ring) refers to as half-orcs. They are boasting that they will be fine in the sunlight, in fact, they seem to be saying 'Wait until the sun comes up, then you'll see what sort of deep doo-doo you're in!' They would not make this statement if they were in any way going to be in trouble when the sun came up. From Gamling's quote we can infer that uruks probably were affected by the sun. So either the orcs were idly boasting and were about to cower in the sun, or else they were saying that they would not cower in the sun, and hence were Saruman's half-orcs. Of course they also say that they are the Uruk-hai, which can be interpreted as either meaning that they are uruks with the special distinctions of being half-orcs and sun-tolerant, or else it could mean that Uruk-hai is a term quite separate from
Uruk, and refers to the traits of being both half-orc and sun tolerant.
Again I'll make my assertion that '-hai' might mean men, and thus claiming to be the 'Uruk-hai' is the same as claiming to be orc-men/men-orcs, which is how Tolkien, Gamling, Aragorn,
Merry, and Treebeard seem to refer to the troops of Saruman. Uruk-hai is undeniably a
black speech term, and man-orc/orc-man is an English term. It would not surprise me at all if the orcs of Saruman who might be half orcs refer to themselves as orc-men in Black-speech, while all the English-speaking characters used the same term in English. I notice that Tolkien uses this sort of naming convention throughout his works.
Rohirrim, from
Sindarin meaning 'host of the horse-lords', an apt name for a people with so many horses;
Baranduin, Sindarin for 'golden-brown river', an apt name for such a muddy river;
Ered Wethrin, Sindarin for '
mountains of shadow', so named for the deep shadows they cast over the lands to the north. Why not
Uruk-hai, Black Speech for 'orc-men', an apt name for the
race bred from orcs and men? I believe this usage would be consistent with the manner Tolkien used in naming
peoples and
places, and would also be consistent with the usage of the term in the
books.