propanal vs aldehyde

propanal and aldehyde both are nouns.

Word	Noun	Adjective	Verb	Adverb
propanal	Yes	No	No	No
aldehyde	Yes	No	No	No

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

propanal: a colorless liquid aldehyde
aldehyde: any of a class of highly reactive chemical compounds; used in making resins and dyes and organic acids

propanal (noun)	aldehyde (noun)
a colorless liquid aldehyde	any of a class of highly reactive chemical compounds; used in making resins and dyes and organic acids