calcium hydride vs hydrolith

calcium hydride and hydrolith both are nouns.

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

As nouns, calcium hydride and hydrolith are synonyms defined as:

calcium hydride and hydrolith: a saltlike binary compound (CaH2) used as a reducing agent and source of hydrogen

calcium hydride (noun)	hydrolith (noun)
a saltlike binary compound (CaH2) used as a reducing agent and source of hydrogen	a saltlike binary compound (CaH2) used as a reducing agent and source of hydrogen