Bulge, indulge, divulge, etc.

ULK.

Bulk, hulk, skulk, sulk.

ULM.

Culm,¶ no rhyme.

ULP.

Gulp, sculp, pulp, ensculp.§

ULSE.

Pulse, repulse, impulse, expulse, convulse, insulse.†

ULT.