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

2 senses of calculator

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
calculator, calculating machine -- (a small machine that is used for mathematical calculations)
       => machine -- (any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks)