Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun reckoner

2 senses of reckoner

Sense 1
calculator, reckoner, figurer, estimator, computer -- (an expert at calculation (or at operating calculating machines))
       => expert -- (a person with special knowledge or ability who performs skillfully)

Sense 2
reckoner, ready reckoner -- (a handbook of tables used to facilitate computation)
       => handbook, enchiridion, vade mecum -- (a concise reference book providing specific information about a subject or location)