The word ‘buck’ was used for the male of different animals, certainly of the deer or goat, but the leather called buckskin is likely to have been from the deer.
‘Bugle’ was originally the word for a buffalo or wild ox and the bugle-horn was used first as a drinking vessel and then became in its shortened form the musical instrument (OED).
The thick or hinder part of a hide used for sole leather, especially that of an ox or cow: it was reduced to a rough rectangle by removing the belly and shoulders.
From the French boutoir, an instrument used in various trades for punching or boring holes, found especially in farriers’ workshops where it served to pare horses’ hooves.