councillor / councilor / counsellor / counselor 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. 👇
councillor: NA
councilor: NA
counsellor: NA
counselor: (noun) someone who gives advice about problems. (noun) someone who has supervisory duties at a summer camp.
councillor: NA
councilor: k·AW·n·s·ah·l·er
counsellor: k·AW·n·s·ah·l·er
counselor: k·AW·n·s·ah·l·er
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)