nitrochloromethane vs teargas

nitrochloromethane and teargas both are nouns.

Word	Noun	Adjective	Verb	Adverb
nitrochloromethane	Yes	No	No	No
teargas	Yes	No	Yes	No

As nouns, teargas is a hypernym of nitrochloromethane; that is, teargas is a word with a broader meaning than nitrochloromethane:

nitrochloromethane: gaseous form of chloropicrin used as tear gas
teargas: a gas that makes the eyes fill with tears but does not damage them; used in dispersing crowds

Other hypernyms of nitrochloromethane include lachrymator, lacrimator, tear gas.

nitrochloromethane (noun)	teargas (noun)
gaseous form of chloropicrin used as tear gas	a gas that makes the eyes fill with tears but does not damage them; used in dispersing crowds

nitrochloromethane (verb)	teargas (verb)
	attack with teargas; subject to teargas fumes