hi-spy hipihi hippus huh-uh huishu humhum humism hummum hummus humphs humusy hushih hushup hy-spy hypish hyppus hypsi- immiss impish ipsums ismism mis-pi mishmi misisi misius missis missus missys miysis miyumi mm-hmm muhuhu musius musmus mussum mussup muumuu mymymy myship mysims mysius myssis phipps phyhip physi- physis pipipi pippip pissis piuish piumhi piupiu piusii piyush pppppp ppsspp pumish pumpup puppis pushim pushup pussi shihhi shiism shimmy shippy shishi shisui shmups shshsh shusui shyish siiiii simisi simsim sishui sisisi smushy spissy spyism sum-up sumisu summum sumphs sumsup suphis sushis susumu sympis sympus syphus uh-huh uhhuhs um-hum uppish yumyum yushui