calcium hydride vs hydride

calcium hydride and hydride both are nouns.

Word	Noun	Adjective	Verb	Adverb
calcium hydride	Yes	No	No	No
hydride	Yes	No	No	No

As nouns, hydride is a hypernym of calcium hydride; that is, hydride is a word with a broader meaning than calcium hydride:

calcium hydride: a saltlike binary compound (CaH2) used as a reducing agent and source of hydrogen
hydride: any binary compound formed by the union of hydrogen and other elements

calcium hydride (noun)	hydride (noun)
a saltlike binary compound (CaH2) used as a reducing agent and source of hydrogen	any binary compound formed by the union of hydrogen and other elements