accompanist vs accompanyist

accompanist and accompanyist both are nouns.

Word	Noun	Adjective	Verb	Adverb
accompanist	Yes	No	No	No
accompanyist	Yes	No	No	No

As nouns, accompanist and accompanyist are synonyms defined as:

accompanist and accompanyist: a person who provides musical accompaniment (usually on a piano)

accompanist (noun)	accompanyist (noun)
a person who provides musical accompaniment (usually on a piano)	a person who provides musical accompaniment (usually on a piano)