masses vs people

masses and people both are nouns.

Word	Noun	Adjective	Verb	Adverb
masses	Yes	No	No	No
people	Yes	No	Yes	No

As nouns, masses and people are synonyms defined as:

Other synonyms of masses include hoi polloi, mass, multitude, the great unwashed.

masses (noun)	people (noun)
the common people generally	(plural) any group of human beings (men or women or children) collectively
	the body of citizens of a state or country
	members of a family line
	the common people generally

masses (verb)	people (verb)
	fill with people
	furnish with people