teargas vs tear gas

teargas and tear gas both are nouns.

Word	Noun	Adjective	Verb	Adverb
teargas	Yes	No	Yes	No
tear gas	Yes	No	No	No

As nouns, teargas and tear gas are synonyms defined as:

teargas and tear gas: a gas that makes the eyes fill with tears but does not damage them; used in dispersing crowds

Other synonyms of teargas include lachrymator, lacrimator.

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

teargas (verb)	tear gas (verb)
attack with teargas; subject to teargas fumes