1 syllable:
ad, add, bad, brad, cad, chad, clad, dad, fad, gad, glad, grad, had, lad, mad, madd, nad, pad, plaid, rad, sad, scad, shad, tad

2 syllables:
accad, and had, arm pad, audad, comrade, crawdad, cycad, doodad, dryad, dyad, footpad, full-clad, go bad, grandad, granddad, heptad, hexad, hip pad, hot pad, inkpad, i had, keypad, knee pad, lake chad, launchpad, launch pad, like mad, mail-clad, mossad, nicad, nomad, notepad, not bad, octad, pentad, riyadh, round scad, rug pad, scratchpad, scratch pad, shinpad, sketch pad, snow-clad, soap pad, soledad, stamp pad, tetrad, they had, thigh pad, too bad, triad, unclad, unctad, want ad, wrist pad

3 syllables:
allis shad, aoudad, armor-clad, armour-clad, ashkhabad, body pad, carpet pad, cephalad, cleaning pad, deadbeat dad, elbow pad, galahad, heating pad, helipad, ironclad, launching pad, leningrad, lily pad, magistad, mattress pad, message pad, petrograd, phylloclad, raving mad, river shad, shoulder pad, stalingrad, superadd, trinidad, undergrad, volgograd, writing pad

4 syllables:
hamadryad, hyderabad, mackerel scad, mackerel shad, newspaper ad, olympiad, scantily clad, scouring pad, sir galahad

5 syllables:
capital of chad

7 syllables:
common american shad