pantomimist vs pantomimer

pantomimist and pantomimer both are nouns.

Word	Noun	Adjective	Verb	Adverb
pantomimist	Yes	No	No	No
pantomimer	Yes	No	No	No

As nouns, pantomimist and pantomimer are synonyms defined as:

pantomimist and pantomimer: an actor who communicates entirely by gesture and facial expression

Other synonyms of pantomimist include mime, mimer, mummer.

pantomimist (noun)	pantomimer (noun)
an actor who communicates entirely by gesture and facial expression	an actor who communicates entirely by gesture and facial expression