rhythm section vs percussion section

rhythm section and percussion section both are nouns.

Word	Noun	Adjective	Verb	Adverb
rhythm section	Yes	No	No	No
percussion section	Yes	No	No	No

As nouns, rhythm section and percussion section are synonyms defined as:

rhythm section and percussion section: the section of a band or orchestra that plays percussion instruments

Other synonyms of rhythm section include percussion.

rhythm section (noun)	percussion section (noun)
the section of a band or orchestra that plays percussion instruments	the section of a band or orchestra that plays percussion instruments