1 syllable:
beirne, byrn, ierne, keirn, lierne, zern

2 syllables:
audierne, hodiern, luzerne

1 syllable:
borne, porn, fern, barn, mourn, berne, churn, bern, torn, stern, thorn, turn, erne, urn, worn, cairn, morn, burn, earn, bourn, born, quern, bairn, warn, yarn, horn, kern, learn, shorn, sworn, scorn, spurn, corn, yearn, bourne, darn, byrne

2 syllables:
sauterne, forlorn, sweet fern, spun yarn, stem turn, rope yarn, beech fern, adorn, unworn, seed corn, sweet corn, dent corn, bass horn, adjourn, male fern, firstborn, return, in turn, discern, seed fern, lowborn, sword fern, reborn, upturn, post horn, attorn, unborn, unlearn, field corn, edirne, kick turn, tree fern, forewarn, concern, tricorn, french horn, good turn, flint corn, stillborn, ball fern, bead fern, be born, careworn, car horn, casern, chain fern, christ thorn, cowbarn, cow barn, crepe fern, crow corn, deer fern, ditch fern, extern, fan fern, felt fern, film fern, glade fern, gold fern, grape fern, grass fern, green corn, hand fern, hard fern, hedge thorn, 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, soft corn, strap fern, tea urn, timeworn, tithe barn, tongue fern, unsworn, wall fern, war-worn, whisk fern, wood-fern, wood fern

3 syllables:
about turn, day return, squirrel corn, joint return, unconcern, walking fern, tax return, basset horn, christmas fern, boston fern, royal fern, english horn, climbing fern, powder horn, 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, candy corn, city-born, clover fern, coffee fern, coffee urn, creeping fern, dagger fern, devil's urn, elkhorn fern, false return, fire thorn, floating fern, flour corn, foreign-born, fragile fern, giant fern, glory fern, golden fern, guinea corn, hartford fern, holly fern, in return, jersey fern, kidney fern, lady fern, leather fern, limestone fern, little horn, long beech fern, meadow fern, motor horn, 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, spindle horn, sugar corn, toothed sword fern, water fern, winter fern, winter urn, with concern, yankee corn

4 syllables:
indian corn, carriage return, cinnamon fern, annual fern, aquatic fern, banking concern, baritone horn, braun's holly fern, buckler fern, business concern, cigarette burn, curly grass fern, earthly concern, edible corn, egyptian corn, evergreen thorn, 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, jerusalem thorn, amended return, asparagus fern, alpine lady fern, automobile horn, 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, naked as the day one was born, naked as the day you were born