canter / cantor are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
canter: (noun) a smooth three-beat gait; between a trot and a gallop. (verb) ride at a canter. (verb) go at a canter, of horses. (verb) ride at a cantering pace.
cantor: (noun) the official of a synagogue who conducts the liturgical part of the service and sings or chants the prayers intended to be performed as solos.
canter: k·AE·n·t·er
cantor: k·AE·n·t·er
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)