Or search: dun, egg, fry, jug, tin, zap, bake, char, cook, lace, lard, mask, nuke, rice, sear
3 Syllables: SUU
butchery, pleurisy, purity, surety
4 Syllables: USUU
assuredly, impurity, maturity, obscurity, security

Found 9 words across 2 groupings.