exotherm vs chemical compound

exotherm and chemical compound both are nouns.

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

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

exotherm: a compound that gives off heat during its formation and absorbs heat during its decomposition
chemical compound: (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight

Other hypernyms of exotherm include compound.

exotherm (noun)	chemical compound (noun)
a compound that gives off heat during its formation and absorbs heat during its decomposition	(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight