divorcee vs grass widow

divorcee and grass widow both are nouns.

Word	Noun	Adjective	Verb	Adverb
divorcee	Yes	No	No	No
grass widow	Yes	No	No	No

As nouns, divorcee and grass widow are synonyms defined as:

divorcee and grass widow: a divorced woman or a woman who is separated from her husband

divorcee (noun)	grass widow (noun)
a divorced woman or a woman who is separated from her husband	a divorced woman or a woman who is separated from her husband