picks / pix / pyx 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. 👇
picks: (noun) a small thin device (of metal or plastic or ivory) used to pluck a stringed instrument. (noun) a thin sharp implement used for removing unwanted material. (noun) a heavy iron tool with a wooden handle and a curved head that is pointed on both ends. (noun) a basketball maneuver; obstructing an opponent with one's body. (verb) select carefully from a group. (verb) look for and gather. (verb) provoke. (verb) remove in small bits. (verb) pilfer or rob. (verb) attack with or as if with a pickaxe of ice or rocky ground, for example.
pix: NA
pyx: (noun) a chest in which coins from the mint are held to await assay. (noun) any receptacle in which wafers for the Eucharist are kept.
picks: p·IH·k·s
pix: p·IH·k·s
pyx: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)