moose / mousse 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. 👇
moose: NA
mousse: (noun) a rich, frothy, creamy dessert made with whipped egg whites and heavy cream. (noun) a light creamy dish made from fish or meat and set with gelatin. (noun) toiletry consisting of an aerosol foam used in hair styling. (verb) apply a styling gel to.
moose: m·UW·s
mousse: m·UW·s
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)