ethanal trimer vs paraldehyde

ethanal trimer and paraldehyde both are nouns.

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

As nouns, ethanal trimer and paraldehyde are synonyms defined as:

ethanal trimer and paraldehyde: a colorless liquid (a cyclic trimer of acetaldehyde) that is used as a sedative and a solvent

ethanal trimer (noun)	paraldehyde (noun)
a colorless liquid (a cyclic trimer of acetaldehyde) that is used as a sedative and a solvent	a colorless liquid (a cyclic trimer of acetaldehyde) that is used as a sedative and a solvent