expedience / expedients 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. 👇
expedience: (noun) the quality of being suited to the end in view.
expedients: (noun) a means to an end; not necessarily a principled or ethical one.
expedience: ih·k·s·p·IY·d·iy·ah·n·s
expedients: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)