reckoner vs figurer

reckoner and figurer both are nouns.

Word	Noun	Adjective	Verb	Adverb
reckoner	Yes	No	No	No
figurer	Yes	No	No	No

As nouns, reckoner and figurer are synonyms defined as:

reckoner and figurer: an expert at calculation (or at operating calculating machines)

Other synonyms of reckoner include calculator, computer, estimator.

reckoner (noun)	figurer (noun)
a handbook of tables used to facilitate computation	an expert at calculation (or at operating calculating machines)
an expert at calculation (or at operating calculating machines)