teargas vs lachrymator

teargas and lachrymator both are nouns.

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

As nouns, teargas and lachrymator are synonyms defined as:

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

Other synonyms of teargas include lacrimator, tear gas.

teargas (noun)	lachrymator (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)	lachrymator (verb)
attack with teargas; subject to teargas fumes