symphonist vs composer

symphonist and composer both are nouns.

Word	Noun	Adjective	Verb	Adverb
symphonist	Yes	No	No	No
composer	Yes	No	No	No

As nouns, composer is a hypernym of symphonist; that is, composer is a word with a broader meaning than symphonist:

symphonist (noun)	composer (noun)
a composer of symphonies	someone who composes music, usually as a profession