computer vs calculator

computer and calculator both are nouns.

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

As nouns, computer and calculator are synonyms defined as:

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

Other synonyms of computer include estimator, figurer, reckoner.

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