tray / trey 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. 👇
tray: (noun) an open receptacle for holding or displaying or serving articles or food.
trey: (noun) one of four playing cards in a deck having three pips.
tray: t·r·EY
trey: t·r·EY
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)