1 syllable:
-born, -borne, bjoern, bjorn, boerne, born, borne, bourn, bourne, corn, corne, doorn, dorn, frorn, horn, horne, korn, lorne, morn, mourn, mourne, orn, orne, porn, quorn, schorn, scorn, shorn, sporn, thorn, thorne, torn, torne, warn, warne, worn, yourn, zorn

2 syllables:
aborn, adorn, airborn, airborne, alcorn, allcorn, amborn, anorn, ashbourne, awarn, base-born, bass horn, bemourn, be born, bighorn, blackthorn, blood-borne, bloodborne, bluhdorn, broom-corn, broomcorn, buckhorn, buckthorn, bullhorn, careworn, car horn, chairborne, christ thorn, crowsworn, crow corn, dead-born, dearborn, dent corn, diswarn, earth-born, eekhoorn, eggcorn, einhorn, elkhorn, fairborn, feedhorn, field corn, findhorn, first-born, firstborn, fishbourne, flint corn, foodborne, fool-born, forborne, foresworn, forewarn, foreworn, forlorn, forsworn, french horn, gisborne, glyndebourne, green corn, hartshorn, hawthorn, hedge thorn, high-born, hirshhorn, inborn, itworn, jetborne, kilborne, lamborn, lasslorn, last-born, lastborn, layborne, longhorn, low-born, lowborn, mangcorn, mindhorn, mistborn, mongcorn, mungcorn, neushoorn, noforn, nordhorn, o'diorne, osborn, osborne, oudtshoorn, outscorn, outworn, pangborn, parforn, pibgorn, pile-worn, popcorn, post horn, preborn, prewarn, pronghorn, quickthorn, radborne, reborn, redhorn, runcorn, sanborn, schoellhorn, sea-born, seaborne, seed corn, self-born, shard-borne, shoehorn, shopkorn, shopworn, sigh-born, skywarn, soft corn, steinborn, still-born, still/born, stillborn, stockhorn, stormborn, straighthorn, suborn, sweet corn, terkhorn, tick-borne, time-worn, timeworn, tinhorn, toilworn, tomorn, tooth-borne, true-born, trueborn, twice-born, unborn, unshorn, unsworn, upborne, vandorn, vanhorn, vanhorne, waldhorn, wanhorn, war-worn, ward-corn, warworn, wave-worn, waveworn, wayworn, well-born, wellborn, wendehorn, whitehorn, whithorn, wind-borne, windborne, youporn

3 syllables:
amelcorn, apeldoorn, aragorn, avercorn, barley-corn, barleycorn, basset horn, bella thorne, candy corn, city-born, cyberporn, disadorn, dragonborn, english horn, false buckthorn, fire thorn, flour corn, foreign-born, girlsdoporn, guinea corn, gunicorn, hegadorn, heliborne, legendborn, little horn, mageborn, manglehorn, mclawhorn, metecorn, motor horn, native-born, natural-born, oceanborn, otterbourne, paderborn, pear hawthorn, pepper-corn, peppercorn, pfefferkorn, plenicorn, polkinghorn, powder horn, romanshorn, sirindhorn, spindle horn, squirrel corn, sugar corn, taxicorn, trevor horn, unadorn, unicorn, water-borne, water-worn, waterborne, winterbourne, yankee corn

4 syllables:
alder buckthorn, allalinhorn, baritone horn, chulalongkorn, edible corn, egyptian corn, english hawthorn, evergreen thorn, indian corn, jeanne tripplehorn, jesus is born, lamellicorn, little bighorn, rhea seehorn, southern buckthorn, texas longhorn

5 syllables:
automobile horn, golden age of porn, jerusalem thorn, vajiralongkorn, virtualrealporn

6 syllables:
california buckthorn, carolina buckthorn, johnny english reborn, rocky mountain bighorn

7 syllables:
battle of little bighorn

8 syllables:
battle of the little bighorn, naked as the day one was born, naked as the day you were born

1 syllable:
bern, stern, bairn, turn, darn, urn, erne, yarn, cairn, fern, kern, barn, learn, berne, burn, earn, spurn, yearn, quern, churn, byrne

2 syllables:
sauterne, return, in turn, discern, seed fern, unworn, sword fern, beech fern, upturn, attorn, good turn, adjourn, unlearn, sweet fern, edirne, spun yarn, stem turn, rope yarn, kick turn, tree fern, concern, male fern, ball fern, bead fern, casern, chain fern, cowbarn, cow barn, crepe fern, deer fern, ditch fern, extern, fan fern, felt fern, film fern, glade fern, gold fern, grape fern, grass fern, hand fern, hard fern, horse barn, ill turn, interne, king fern, lace fern, lip fern, marsh fern, o'beirne, oak fern, pine fern, rasp fern, relearn, rope burn, scale fern, secern, shield fern, snake fern, strap fern, tea urn, tithe barn, tongue fern, wall fern, whisk fern, wood-fern, wood fern

3 syllables:
royal fern, tax return, joint return, climbing fern, about turn, unconcern, walking fern, christmas fern, day return, boston fern, bamboo fern, basket fern, berry fern, bird's nest fern, black tree fern, bladder fern, boulder fern, bristle fern, brittle fern, broad beech fern, butter churn, button fern, clover fern, coffee fern, coffee urn, creeping fern, dagger fern, devil's urn, elkhorn fern, false return, floating fern, fragile fern, giant fern, glory fern, golden fern, hartford fern, holly fern, in return, jersey fern, kidney fern, lady fern, leather fern, limestone fern, long beech fern, meadow fern, mountain fern, new york fern, ostrich fern, ribbon fern, sago fern, scented fern, self-concern, serpent fern, silver fern, smooth lip fern, soft shield fern, soft tree fern, spider fern, toothed sword fern, water fern, winter fern, winter urn, with concern

4 syllables:
cinnamon fern, carriage return, annual fern, aquatic fern, banking concern, braun's holly fern, buckler fern, business concern, cigarette burn, curly grass fern, earthly concern, flowering fern, fragrant cliff fern, fragrant shield fern, fragrant wood fern, hairy lip fern, licorice fern, mosquito fern, mountain male fern, narrow beech fern, nebraska fern, northern beech fern, northern oak fern, pay as you earn, potato fern, prickly shield fern, printing concern, rattlesnake fern, sensitive fern, silver tree fern, southern beech fern, umbrella fern, without concern, wooly lip fern, worldly concern

5 syllables:
chili con carne, point of no return, amended return, asparagus fern, alpine lady fern, brittle bladder fern, california fern, climbing bird's nest fern, evergreen wood fern, florida strap fern, income tax return, interrupted fern, leathery grape fern, marginal wood fern, massachusetts fern, mountain bladder fern, mountain parsley fern, northern holly fern, oleander fern, packaging concern, resurrection fern, skeleton fork fern, southwestern lip fern, virginia chain fern, western holly fern

6 syllables:
alabama lip fern, american wall fern, carolina pond fern, exponential return, giant scrambling fern, indian button fern, information return

7 syllables:
american parsley fern, estimated tax return, european parsley fern

8 syllables:
canary island hare's foot fern, central american strap fern