health hazard vs endangerment

health hazard and endangerment both are nouns.

Word	Noun	Adjective	Verb	Adverb
health hazard	Yes	No	No	No
endangerment	Yes	No	No	No

As nouns, endangerment is a hypernym of health hazard; that is, endangerment is a word with a broader meaning than health hazard:

health hazard: hazard to the health of those exposed to it
endangerment: a source of danger; a possibility of incurring loss or misfortune

Other hypernyms of health hazard include hazard, jeopardy, peril, risk.

health hazard (noun)	endangerment (noun)
hazard to the health of those exposed to it	a source of danger; a possibility of incurring loss or misfortune