imposter vs shammer

imposter and shammer both are nouns.

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

As nouns, imposter and shammer are synonyms defined as:

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

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