2 syllables:
are none, arnon, bar none, carnin, farnan, parnon, sarnen

3 syllables:
mcclarnon

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

2 syllables:
sauterne, forlorn, sweet fern, stem turn, beech fern, adorn, unworn, seed corn, sweet corn, dent corn, bass horn, adjourn, firstborn, male fern, 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, airman, armen, armin, barman, berman, carmen, carmine, chairman, darman, dorman, ermine, fireman, firemen, foreman, fuhrman, german, harmon, herman, hermann, mormon, norman, sermon, sherman, vernon

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, bellarmine, determine, high german, longshoreman, low german, mount vernon, omdurman, vice chairman

4 syllables:
indian corn, carriage return, cinnamon fern, anglo-norman, book of mormon, kinosternon, old high german, predetermine

5 syllables:
point of no return, jerusalem thorn, amended return, asparagus fern, assistant foreman, middle high german, middle low german, the book of mormon, tibeto-burman, visiting fireman