Also see words start with in, im, is, ir, id, il, ic, io, it, ig, ia, iv, ib, ip, if, ix, ik, iz, ih, iw. 
 2-letter words start with 'i' (5) 3-letter words start with 'i' (20) 4-letter words start with 'i' (59) 5-letter words start with 'i' (120) 6-letter words start with 'i' (294) 7-letter words start with 'i' (517) 8-letter words start with 'i' (753) 9-letter words start with 'i' (964) 10-letter words start with 'i' (982) 11-letter words start with 'i' (871) 12-letter words start with 'i' (764) 13-letter words start with 'i' (602) 14-letter words start with 'i' (371) 15-letter words start with 'i' (306)