1 syllable:
bead, bede, bleed, brede, breed, cede, creed, deed, ede, feed, freed, fried, glede, gleed, greed, he'd, heed, keyed, knead, kneed, lead, mead, meade, need, plead, read, reed, reid, screed, seed, she'd, skied, snead, speed, steed, swede, teed, treed, tweed, we'd, weed

2 syllables:
accede, agreed, agueweed, aidid, airspeed, alkyd, arctiid, axseed, benweed, bindweed, blackseed, black bead, blueweed, brookweed, broomweed, bur reed, cane reed, canid, capeweed, catchweed, chafeweed, chaffweed, cheerlead, chickweed, clearweed, concede, creep feed, crossbreed, cudweed, decreed, dill seed, dill weed, ditch reed, duckweed, dyeweed, exceed, fanweed, fern seed, flaxseed, force-feed, force feed, free-reed, french weed, frostweed, ghost weed, glochid, greenweed, groundspeed, gulfweed, gumweed, half-breed, hawkweed, hayseed, high-speed, hogweed, horseweed, impede, implead, inbreed, indeed, knapweed, knock-kneed, knotweed, light speed, limeade, line feed, linseed, lipide, lockheed, lygaeid, markweed, matchweed, mayweed, milkweed, misdeed, mislead, misread, moonseed, nitweed, nosebleed, oilseed, pay heed, pearlweed, pigweed, pineweed, pitied, pokeweed, pondweed, precede, proceed, proofread, q.e.d, quirk bead, ragweed, rapeseed, rashid, recede, reread, reseed, richweed, rockweed, sand reed, seaweed, secede, siegfried, silkweed, skunkweed, smartweed, snakeweed, sneezeweed, soapweed, spoon-feed, spoonfeed, stampede, stinkweed, succeed, take heed, tarweed, teiid, tickseed, tickweed, trust deed, wartweed, weak-kneed, white bead

3 syllables:
aniseed, antecede, aristide, at full speed, beetleweed, beggarweed, benniseed, bitterweed, bottle-feed, bottlefeed, bugleweed, butterweed, camphorweed, cancerweed, cancer weed, candyweed, cankerweed, carpetweed, centipede, cerripede, chickenfeed, chicken feed, clammyweed, common reed, copyread, cottonseed, cottonweed, crazyweed, crazy weed, devil's weed, dilaudid, disagreed, double reed, english-weed, false ragweed, fennel seed, fireweed, ganymede, gelechiid, giant reed, gravelweed, great duckweed, great ragweed, guaranteed, gypsyweed, harris tweed, interbreed, intercede, interplead, ironweed, jamestown weed, jewelweed, jimsonweed, jumping seed, locoweed, lymantriid, marsh milkweed, mead's milkweed, millepede, millipede, mortgage deed, mustard seed, orangeade, overfeed, pedigreed, poke milkweed, polecat weed, poppy seed, pressure feed, prickle-weed, pumpkinseed, pumpkin seed, rabbitweed, rattle weed, reduviid, retrocede, rosinweed, saturniid, scarabaeid, silkworm seed, silverweed, star-duckweed, stinking weed, supersede, swamp milkweed, symphilid, thimbleweed, title deed, trumpet weed, tumbleweed, underfeed, velvetweed, walter reed, waterweed, white milkweed

4 syllables:
balm of gilead, butterfly weed, canary seed, caraway seed, celery seed, common duckweed, common ragweed, consumption weed, corn gluten feed, edible seed, fenugreek seed, gracilariid, hemerobiid, horsetail milkweed, house centipede, lesser duckweed, megatheriid, orange milkweed, pickerelweed, pickerel weed, pineapple weed, poeciliid, poison milkweed, rattlesnake weed, safflower seed, scorpionweed, scorpion weed, sesame seed, showy milkweed, star aniseed, sunflower seed, tettigoniid, trombiculiid, turpentine weed, unguaranteed, velocipede, vinegarweed, water flaxseed, western ragweed

5 syllables:
alligator weed, coriander seed, execution speed, garden centipede, rheumatism weed

6 syllables:
egyptian paper reed, perennial ragweed