shammer vs impostor

shammer and impostor both are nouns.

Word	Noun	Adjective	Verb	Adverb
shammer	Yes	No	No	No
impostor	Yes	No	No	No

As nouns, shammer and impostor are synonyms defined as:

Other synonyms of shammer include fake, faker, fraud, imposter, pretender, pseud, pseudo, role player, sham.

shammer (noun)	impostor (noun)
a person who makes deceitful pretenses	a person who makes deceitful pretenses
someone shirking their duty by feigning illness or incapacity