Word: 
Similar-sounding words in the dictionary:
3 letters:
flu, pew, pla, ply, pru
4 letters:
bleu, blew, blue, clue, flew, flue, glew, glue, peru, play, plea, plow, ploy, prew, prue, pugh, slew, plew
5 letters:
peugh, plewa, ploof, plude, plume, pluth, prugh
6 letters:
plough