dance orchestra vs dance band

dance orchestra and dance band both are nouns.

Word	Noun	Adjective	Verb	Adverb
dance orchestra	Yes	No	No	No
dance band	Yes	No	No	No

As nouns, dance orchestra and dance band are synonyms defined as:

dance orchestra and dance band: a group of musicians playing popular music for dancing

Other synonyms of dance orchestra include band.

dance orchestra (noun)	dance band (noun)
a group of musicians playing popular music for dancing	a group of musicians playing popular music for dancing