Here's what rhymes with msup.
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such sub shut hut hub thud fudge but what much cut judge touch flood mud bud butt gut nut rub tub nought pub shrub sludge stud budge cub mot stub cud dub nudge putt rut slut snub tut wot jut blood club clutch grudge scrub grub strut crutch glut uncut somewhat insomuch overmuch rebut undercut coconut hump thump sump pump jump pulp lump bump dump stump cusp rump slump gulp plump clump trump