synthesiser vs synthesist

synthesiser and synthesist both are nouns.

Word	Noun	Adjective	Verb	Adverb
synthesiser	Yes	No	No	No
synthesist	Yes	No	No	No

As nouns, synthesiser and synthesist are synonyms defined as:

synthesiser and synthesist: an intellectual who synthesizes or uses synthetic methods

Other synonyms of synthesiser include synthesizer.

synthesiser (noun)	synthesist (noun)
(music) an electronic instrument (usually played with a keyboard) that generates and modifies sounds electronically and can imitate a variety of other musical instruments	an intellectual who synthesizes or uses synthetic methods
an intellectual who synthesizes or uses synthetic methods