Rasterop rhymes with:
aesop, allsop, allsopp, alltop, backdrop, backstop, barbershop, bebop, bellhop, blacktop, bookshop, bookstop, co-op, countertop, daytop, desktop, dunlop, eavesdrop, eyedrop, gigaflop, hilltop, laptop, lollipop, malaprop, mountaintop, non-stop, pawnshop, paysop, picop, raindrop, robocop, rolltop, rooftop, sharecrop, shortstop, sweatshop, tabletop, turboprop, wardrop, workshop