crater / krater 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. 👇
crater: (noun) a faint constellation in the southern hemisphere near Hydra and Corvus. (noun) a bowl-shaped depression formed by the impact of a meteorite or bomb.
krater: NA
crater: k·r·EY·t·er
krater: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)