accepter / acceptor 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. 👇
accepter: NA
acceptor: (noun) (chemistry) in the formation of a coordinate bond it is the compound to which electrons are donated. (noun) the person (or institution) who accepts a check or draft and becomes responsible for paying the party named in the draft when it matures.
accepter: NA
acceptor: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)