birch oil vs salicylate

birch oil and salicylate both are nouns.

Word	Noun	Adjective	Verb	Adverb
birch oil	Yes	No	No	No
salicylate	Yes	No	No	No

As nouns, salicylate is a hypernym of birch oil; that is, salicylate is a word with a broader meaning than birch oil:

birch oil: a liquid ester with a strong odor of wintergreen; applied externally for minor muscle and joint pain
salicylate: a salt of salicylic acid (included in several commonly used drugs)

birch oil (noun)	salicylate (noun)
a liquid ester with a strong odor of wintergreen; applied externally for minor muscle and joint pain	a salt of salicylic acid (included in several commonly used drugs)