For the fun of it, I've just had a go at running through a word list (British and American spellings, size 70) downloaded from Aspell. I've only tried 4 and 5 letter words and only chosen what I'd think are the most likely vowel positions.

This is what I got. Lists with an asterisk are ones where I was doubtful about at least one word and can't find a definition in Chambers.

ball, bell, bill, boll, bull
band, bend, bind, bond, bund
bats, bets, bits, bots, buts
dabs, debs, dibs, dobs, dubs
dang, deng, ding, dong, dung*
fall, fell, fill, foll, full*
hack, heck, hick, hock, huck
hams, hems, hims, homs, hums*
hans, hens, hins, hons, huns*
last, lest, list, lost, lust
mass, mess, miss, moss, muss
nabs, nebs, nibs, nobs, nubs
pack, peck, pick, pock, puck
pang, peng, ping, pong, pung*
pans, pens, pins, pons, puns
paps, peps, pips, pops, pups
pats, pets, pits, pots, puts
rack, reck, rick, rock, ruck
sans, sens, sins, sons, suns
tall, tell, till, toll, tull*
tans, tens, tins, tons, tuns
tats, tets, tits, tots, tuts*
balls, bells, bills, bolls, bulls
massy, messy, missy, mossy, mussy
packs, pecks, picks, pocks, pucks