1 syllable:
must, -fest, .test, blust, brust, bused, bussed, bust, christe, clist, crust, cussed, fussed, fust, guist, gust, guste, hkust, hust, just, knust, krust, kruste, lust, mussed, prust, rust, schussed, seced, shist, sussed, thrust, trussed, trust, wrust, yust

2 syllables:
adjust, adust, bedust, betrust, bewusst, blood-lust, braintrust, bulldust, buybust, centrust, clevetrust, coaldust, combust, concussed, crop-dust, debussed, discussed, disgust, distrust, encrust, entrust, flingdust, giftrust, gold-dust, goldust, healthtrust, incrust, intrust, mistrust, moondust, non-plussed, nonplused, nonplussed, onrust, outthrust, pentrust, percussed, piecrust, robust, saint-just, sawdust, self-trust, shortcrust, slothrust, smartdust, stardust, suntrust, undust, unjust, unlust, untrust, upthrust, verlust, vetust, volksrust, wantrust

3 syllables:
anti-trust, antirust, antitrust, beyondtrust, bundobust, citytrust, coadjust, cut-and-thrust, dry-as-dust, dryasdust, duricrust, hathitrust, identrust, indiscussed, kissingcrust, meditrust, mid-august, misadjust, overthrust, overtrust, prudentrust, readjust, repercussed, self-disgust, self-distrust, sevendust, unadjust, underthrust, undiscussed, unitrust, upper-crust, ustrust, wanderlust

4 syllables:
ameritrust, trustee-in-trust

1 syllable:
brushed, hushed, crushed, rushed, puffed, cuffed, flushed, tuft, stuffed

3 syllables:
candytuft