1 syllable:
bragh, brzeg, bug, bugg, bugge, cb sig, chug, doug, drug, druig, dug, gss tsig, hug, hugg, jug, klug, krug, lbc ig, lug, plug, plugg, plugh, pug, rug, rugg, schug, shrug, slesvig, slug, smug, snug, sprug, sugg, the agg, throg, thug, tug, ugh, zug

2 syllables:
abzug, almug, apcug, aslug, aufzug, auszug, bear-hug, bearhug, bear hug, bedrug, bed bug, betrug, bettzeug, bigbug, billbug, boat bug, buttplug, darug, debug, drainplug, earplug, eilzug, fagbug, fahrzeug, fireplug, flugzeug, gelug, glowplug, goldbug, greenbug, hard drug, homeplug, humbug, junebug, june bug, kuchlug, lace bug, leaf bug, lovebug, macsbug, male plug, may bug, meshugge, misbug, mudbug, mudug, nondrug, okrug, omfug, phone plug, pill bug, plant bug, prayer rug, pro-drug, prodrug, rawlplug, redbug, rose bug, schlagzeug, schnellzug, sea slug, shag rug, smugmug, soft drug, sowbug, sow bug, sparkplug, spark plug, spielzeug, squash bug, street drug, tanjug, tausug, throw rug, true bug, umzug, unplug, wall plug, werkzeug, wheel bug, young thug

3 syllables:
anti-drug, antidrug, aslaug, bunny hug, cancer drug, carpet bug, chug-a-lug, chugalug, crotonbug, doodle-bug, doodlebug, europlug, feuerzeug, firebug, galmudug, instabug, jitterbug, kissing bug, kremenchug, ladybug, lightning bug, litterbug, mandelbug, mealybug, mealy bug, multidrug, nobiskrug, polydrug, roseslug, scatter rug, schroedinbug, semi-slug, sheevaplug, shutterbug, sparking plug, spittlebug, sulfa drug, superbug, superdrug, toby jug, tumblebug, ukuug, waterbug, water bug, water jug, weatherbug, whiskey jug, wonder drug, zwischenzug

4 syllables:
arenabg, assassin bug, astringent drug, badeanzug, designer drug, erasmusbrug, ethical drug, neubaufahrzeug, potato bug, prescription drug, riesenflugzeug, sedative drug, tarnished plant bug, telephone plug

5 syllables:
diuretic drug, fertility drug, giant water bug, medicinal drug, psychedelic drug, sweep under the rug, tcl-debug

6 syllables:
antibiotic drug, antidepressant drug

7 syllables:
antibacterial drug, hallucinogenic drug