Simple closed curve, Jordan curve related term adj, balmy, barmy, bats, batty, bonkers, buggy, cracked, crackers, daft, dotty, fruity, haywire, kooky, kookie, loco, loony, nuts, nutty, round the bend, around the bend, wacky, whacky, insane similar term
Vogais: ooy
Consoantes: lp
loop, looby, loppy, lop, lollop, loopie, lowboy, loob, loof, lope.