Dun, gun, nun, pun, run, sun, shun, tun, stun, spun, begun, son, won, ton, done, one, none, undone.
UNCE.
Dunce, once, etc.
UNCH.
Bunch, punch, hunch, lunch, munch, scrunch,§ crunch.§
UNCT.
Defunct, disjunct, rhymes preterites and participles of verbs in UNK.
UND.
Fund, refund, preterites of verbs in UN, etc.
UNE.