calculator vs computer

calculator and computer both are nouns.

Word	Noun	Adjective	Verb	Adverb
calculator	Yes	No	No	No
computer	Yes	No	No	No

As nouns, calculator and computer are synonyms defined as:

calculator and computer: an expert at calculation (or at operating calculating machines)

Other synonyms of calculator include estimator, figurer, reckoner.

calculator (noun)	computer (noun)
a small machine that is used for mathematical calculations; can be mechanical or electronic	a machine for performing calculations automatically
an expert at calculation (or at operating calculating machines)	an expert at calculation (or at operating calculating machines)