Word: 
Similar-sounding words in the dictionary:
4 letters:
cool, kool
5 letters:
coole, scale, scoop, scoot, scowl, scull, skeel, skill, skoal, skoog, skull, spool, stool
6 letters:
schell, schoon
7 letters:
schools, schuett
8 letters:
school's, schooled, schooler, schooley, schools', schuette