revolutions per minute vs rpm

revolutions per minute and rpm both are nouns.

Word	Noun	Adjective	Verb	Adverb
revolutions per minute	Yes	No	No	No
rpm	Yes	No	No	No

As nouns, revolutions per minute and rpm are synonyms defined as:

Other synonyms of revolutions per minute include rev.

revolutions per minute (noun)	rpm (noun)
rate of revolution of a motor	rate of revolution of a motor