massage vs rub down

massage is a noun but rub down is not a noun.

Word	Noun	Adjective	Verb	Adverb
massage	Yes	No	Yes	No
rub down	No	No	Yes	No

As verbs, massage and rub down are synonyms defined as:

massage and rub down: manually manipulate (someone's body), usually for medicinal or relaxation purposes

Other synonyms of massage include knead.

massage (noun)	rub down (noun)
kneading and rubbing parts of the body to increase circulation and promote relaxation

massage (verb)	rub down (verb)
give a massage to	wear away
manually manipulate (someone's body), usually for medicinal or relaxation purposes	manually manipulate (someone's body), usually for medicinal or relaxation purposes