isomer vs chemical compound

isomer and chemical compound both are nouns.

Word	Noun	Adjective	Verb	Adverb
isomer	Yes	No	No	No
chemical compound	Yes	No	No	No

As nouns, chemical compound is a hypernym of isomer; that is, chemical compound is a word with a broader meaning than isomer:

isomer: a compound that exists in forms having different arrangements of atoms but the same molecular weight
chemical compound: (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight

Other hypernyms of isomer include compound.

isomer (noun)	chemical compound (noun)
a compound that exists in forms having different arrangements of atoms but the same molecular weight	(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight