pager vs beeper

pager and beeper both are nouns.

Word	Noun	Adjective	Verb	Adverb
pager	Yes	No	No	No
beeper	Yes	No	No	No

As nouns, pager and beeper are synonyms defined as:

pager and beeper: an electronic device that generates a series of beeps when the person carrying it is being paged

pager (noun)	beeper (noun)
an electronic device that generates a series of beeps when the person carrying it is being paged	an electronic device that generates a series of beeps when the person carrying it is being paged