Here's what rhymes with undershrub.
rub shrub sub club tub hub pub scrub cub grub stub dub snub nub Words that almost rhyme with undershrub
flood sludge rut slut sloughed but such what much blood cut judge touch cup mud shut hut bud butt gut nut clutch grudge nought stud sup budge mot strut thud crutch cud glut nudge pup putt tut wot drudge fudge jut mutt smudge smut trudge undercut rebut uncut abut adjudge begrudge workup somewhat overmuch insomuch coconut bulb