impostor vs pseud

impostor and pseud both are nouns.

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

As nouns, impostor and pseud are synonyms defined as:

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

impostor (noun)	pseud (noun)
a person who makes deceitful pretenses	a person who makes deceitful pretenses