Word: 
Similar-sounding words in the dictionary:
3 letters:
but, cut, gut, hut, jut, nut, rut, tut
4 letters:
butt, knut, mutt, putt, shot, shun, what, shut
5 letters:
chute, sheet, shirt, shoot, shout, shove, shuck, shunt, shute, shuts
6 letters:
schott, schuch
7 letters:
shutter