symphonic music vs symphony

symphonic music and symphony both are nouns.

Word	Noun	Adjective	Verb	Adverb
symphonic music	Yes	No	No	No
symphony	Yes	No	No	No

As nouns, symphonic music and symphony are synonyms defined as:

symphonic music and symphony: a long and complex sonata for symphony orchestra

symphonic music (noun)	symphony (noun)
a long and complex sonata for symphony orchestra	a long and complex sonata for symphony orchestra
	a large orchestra; can perform symphonies