Word: 
Similar-sounding words in the dictionary:
1 letter:
x
2 letters:
ex, x.
3 letters:
dex, hix, hux, jex, lex, rex, sex, tex, vex
4 letters:
heck, hess, hetz, hext, hoax
5 letters:
becks, dec's, decks, eckes, hacks, hakes, haq's, hawks, hecco, hecht, hence, hense, hesse, hicks, hikes, hooks, hucks, hykes, necks, techs
6 letters:
beck's, checks, czechs, hawkes, hecker, hekker, henkes, hook's, meckes, peck's, shek's, tech's, teck's, wrecks
7 letters:
haecker, hawke's, hecht's, sheck's