can't / cant 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. 👇
can't: NA
cant: (noun) insincere talk about religion or morals. (verb) heel over.
can't: k·AE·n·t
cant: k·AE·n·t
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)