Word: 
Similar-sounding words in the dictionary:
4 letters:
sigl
5 letters:
civet, cyril, sibil, sibyl, sigel, sivak
6 letters:
divall, sichel, sickel, sickle, siddle, sippel, sipple, sissel, sivils, sizzle, swivel
7 letters:
cissell, servile, siddall, siddell