step / steppe 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. 👇
step: (noun) the act of changing location by raising the foot and setting it down. (noun) support consisting of a place to rest the foot while ascending or descending a stairway. (noun) a short distance. (noun) a solid block joined to the beams in which the heel of a ship's mast or capstan is fixed. (verb) shift or move by taking a step. (verb) put down or press the foot, place the foot. (verb) cause (a computer) to execute a single command. (verb) furnish with steps. (verb) move with one's feet in a specific manner. (verb) walk a short distance to a specified place or in a specified manner. (verb) place (a ship's mast) in its step. (verb) move or proceed as if by steps into a new situation.
steppe: (noun) extensive plain without trees (associated with eastern Russia and Siberia).
step: s·t·EH·p
steppe: s·t·EH·p
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)