crushed leather vs leather

crushed leather and leather both are nouns.

Word	Noun	Adjective	Verb	Adverb
crushed leather	Yes	No	No	No
leather	Yes	No	Yes	No

As nouns, leather is a hypernym of crushed leather; that is, leather is a word with a broader meaning than crushed leather:

crushed leather: leather that has had its grain pattern accentuated
leather: an animal skin made smooth and flexible by removing the hair and then tanning

crushed leather (noun)	leather (noun)
leather that has had its grain pattern accentuated	an animal skin made smooth and flexible by removing the hair and then tanning

crushed leather (verb)	leather (verb)
	whip with a leather strap