hydrogen azide vs hydrazoic acid

hydrogen azide and hydrazoic acid both are nouns.

Word	Noun	Adjective	Verb	Adverb
hydrogen azide	Yes	No	No	No
hydrazoic acid	Yes	No	No	No

As nouns, hydrogen azide and hydrazoic acid are synonyms defined as:

hydrogen azide and hydrazoic acid: a colorless explosive liquid that is volatile and poisonous and foul-smelling

Other synonyms of hydrogen azide include azoimide, HN.

hydrogen azide (noun)	hydrazoic acid (noun)
a colorless explosive liquid that is volatile and poisonous and foul-smelling	a colorless explosive liquid that is volatile and poisonous and foul-smelling