crews / cruise 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. 👇
crews: (noun) the men and women who man a vehicle (ship, aircraft, etc.). (noun) the team of men manning a racing shell. (verb) serve as a crew member on.
cruise: (noun) an ocean trip taken for pleasure. (verb) drive around aimlessly but ostentatiously and at leisure. (verb) travel at a moderate speed. (verb) look for a sexual partner in a public place. (verb) sail or travel about for pleasure, relaxation, or sightseeing.
crews: k·r·UW·z
cruise: k·r·UW·z
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)