symphony orchestra vs symphony

symphony orchestra and symphony both are nouns.

Word	Noun	Adjective	Verb	Adverb
symphony orchestra	Yes	No	No	No
symphony	Yes	No	No	No

As nouns, symphony orchestra and symphony are synonyms defined as:

symphony orchestra and symphony: a large orchestra; can perform symphonies

Other synonyms of symphony orchestra include philharmonic.

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