kill / kiln 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. 👇
kill: (noun) the destruction of an enemy plane or ship or tank or missile. (verb) cause to die; put to death, usually intentionally or knowingly. (verb) thwart the passage of. (verb) be fatal. (verb) be the source of great pain for. (verb) overwhelm with hilarity, pleasure, or admiration. (verb) hit with so much force as to make a return impossible, in racket games. (verb) hit with great force. (verb) deprive of life. (verb) cause the death of, without intention. (verb) mark for deletion, rub off, or erase. (verb) tire out completely. (verb) cause to cease operating. (verb) destroy a vitally essential quality of or in.
kiln: (noun) a furnace for firing or burning or drying such things as porcelain or bricks.
kill: k·IH·l
kiln: k·IH·l·n
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)