computation vs computing

computation and computing both are nouns.

Word	Noun	Adjective	Verb	Adverb
computation	Yes	No	No	No
computing	Yes	No	No	No

As nouns, computation and computing are synonyms defined as:

computation and computing: the procedure of calculating; determining something by mathematical or logical methods

Other synonyms of computation include calculation.

computation (noun)	computing (noun)
the procedure of calculating; determining something by mathematical or logical methods	the procedure of calculating; determining something by mathematical or logical methods
problem solving that involves numbers or quantities	the branch of engineering science that studies (with the aid of computers) computable processes and structures