Since I wasn't able to find a word with the last 2 letters, I'll use the last 3.
Artist
The forbidden endings:
*ea, *er, *ia, *fy, *ic, *ky, *ly, *ll, *on, *ty, *um, *us, *xo (for having a small set of options)
and all the other two consonant endings that don't start a word.