Droopy rhymes with:
crupi, groupie, bacigalupi, crupi, groupie, juppe, loopy, lupi, snoopy, soupy, tupy, whoopi, whoopie
Droopy sounds like:
darby, darpa, dauterive, deharbe, derby, derive, diatribe, dorf, dorff, drab, drape, drapeau, dravo, drip, drive, drive-by, driveway, droop, drop, drop-off, dropoff, drove, drub, drupe, durfee, durfey, dwarf