ethanal trimer vs aldehyde

ethanal trimer and aldehyde both are nouns.

Word	Noun	Adjective	Verb	Adverb
ethanal trimer	Yes	No	No	No
aldehyde	Yes	No	No	No

As nouns, aldehyde is a hypernym of ethanal trimer; that is, aldehyde is a word with a broader meaning than ethanal trimer:

ethanal trimer: a colorless liquid (a cyclic trimer of acetaldehyde) that is used as a sedative and a solvent
aldehyde: any of a class of highly reactive chemical compounds; used in making resins and dyes and organic acids

ethanal trimer (noun)	aldehyde (noun)
a colorless liquid (a cyclic trimer of acetaldehyde) that is used as a sedative and a solvent	any of a class of highly reactive chemical compounds; used in making resins and dyes and organic acids