cellulose ester vs ester

cellulose ester and ester both are nouns.

Word	Noun	Adjective	Verb	Adverb
cellulose ester	Yes	No	No	No
ester	Yes	No	No	No

As nouns, ester is a hypernym of cellulose ester; that is, ester is a word with a broader meaning than cellulose ester:

cellulose ester: any ester of cellulose with an acid
ester: organic compound formed by reaction between an acid and an alcohol with elimination of water

cellulose ester (noun)	ester (noun)
any ester of cellulose with an acid	organic compound formed by reaction between an acid and an alcohol with elimination of water