- 01.117 supposing the burglar-expert
No OED entries for this one, of course, this is pure JRRT!
No OED entries for this one, of course, this is pure JRRT!
Although “smith-work” is found in OED, the specific work of a blacksmith is not, so this is a JRRT original hyphenated word.
In the 1937 edition of The Hobbit, this word phrase does not appear.
In the OED, it has a compound word entry “birthday present” with an example of “birth-day present”, but in no case hyphenated as JRRT uses it here.
“birthday, n.” OED Online. Oxford University Press, June 2017. Web. 5 September 2017.
It is not found as a compound form under “speech” – nor is any similar, like “whale speech” or “French speech”, so the meaning as “language of the birds” is JRRT original (or the similarly obscure invention of another, but raised into notice by JRRT).
Not found in OED.
No such word in OED.
Beech is any one of about a dozen species in the genus Fagaceae.
Obviously this means “logs of beech wood”, but “beech-log” is not in OED, nor is “beech log” one of those two-word words so stuck together that they get their own entry. This hyphenated form is JRRT original.
Not found in OED.
No such word-concept in OED, I declare this a JRRT original.
No entry at all in OED: obviously “track” is in there, and can follow any sort of animal name, and in that configuration is not one word-concept as JRRT uses it here.

Photo from Wikipedia Commons: “Animal Tracks”.