fort / forte 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. 👇
fort: (verb) gather in, or as if in, a fort, as for protection or defense. (verb) station (troops) in a fort.
forte: (noun) an asset of special worth or utility. (noun) (music) loud. (noun) the stronger part of a sword blade between the hilt and the foible. (adjective) used chiefly as a direction or description in music. (adverb) used as a direction in music; to be played relatively loudly.
fort: f·AO·r·t
forte: f·AO·r·t·ey
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)