computation vs figuring

computation and figuring both are nouns.

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

As nouns, computation and figuring are synonyms defined as:

computation and figuring: problem solving that involves numbers or quantities

Other synonyms of computation include calculation, reckoning.

computation (noun)	figuring (noun)
the procedure of calculating; determining something by mathematical or logical methods	problem solving that involves numbers or quantities
problem solving that involves numbers or quantities