1 syllable:
scarce

2 syllables:
inherse

3 syllables:
carly pearce, cysticerce

1 syllable:
arse, arts, bourse, carts, charts, coarse, corse, cortes, course, court's, courts, curse, darts, farce, fierce, force, fourths, gorse, hearse, hearts, hertz, hoarse, horse, hurts, kurtz, martes, martz, morse, norse, nurse, parse, parts, peirce, pierce, ports, purse, quartz, schwartz, shirts, shorts, shortz, skirts, sorts, source, sparse, sports, starts, terce, terse, tierce, verse, worse

2 syllables:
cirrus, doris, horus, virus, aurous, cyrus, purus, gyrus, peeress, pyrus, torus, morris, laurus, starets, morus, chorus, merits, taurus, porous, sorus, iris, adverse, ahorse, amerce, antrorse, asperse, averse, beaux arts, blank verse, cart horse, cathartes, change course, charles peirce, coach horse, coerce, concerts, converse, converts, cutpurse, dark horse, dawn horse, dextrorse, disburse, disperse, diverse, divorce, draft horse, draught horse, dray horse, dry-nurse, dry nurse, endorse, enforce, farm horse, fine arts, free verse, get worse, gift horse, golf course, head nurse, immerse, imports, indorse, inverse, in force, light source, long horse, main course, male horse, obverse, of course, old norse, perverse, plow horse, point source, pole horse, post horse, race horse, rehearse, remorse, reports, resorts, retrorse, reverse, rose quartz, sales force, scrub nurse, sea horse, sea purse, shire horse, side horse, stick horse, strong force, supports, task force, trained nurse, transports, transverse, traverse, unhorse, weak force, wet-nurse, wet nurse, wheel horse, white horse, wild horse, work force, zairese

3 syllables:
thesaurus, honduras, slow virus, effloresce, liquorice, desirous, sciurus, high spirits, arcturus, ichorous, belarus, ace of hearts, change of course, color force, driving force, female horse, field of force, flying horse, franklin pierce, harness horse, heinrich hertz, hernan cortes, intersperse, in due course, iron horse, jockey shorts, kilohertz, labor force, line of force, line of verse, moral force, nonsense verse, police force, pommel horse, private parts, privy purse, proto-norse, quarter horse, reenforce, reimburse, reinforce, riding horse, river horse, rocking horse, saddle horse, sea of cortes, shepherd's purse, smoky quartz, student nurse, tour de force, towel horse, trojan horse, trotting horse, vaulting horse, vital force, walking horse, with full force, wooden horse

4 syllables:
pythagoras, ardent spirits, retrovirus, brontosaurus, polyporus, myxovirus, herpes virus, stegosaurus, bearded iris, tumor virus, neutral spirits, allosaurus, attractive force, bermuda shorts, by fits and starts, cavalry horse, charles franklin peirce, doctor of arts, doggerel verse, extension course, graduate nurse, hernando cortes, heroic verse, jamaica shorts, liberal arts, magnetic force, master of arts, matter of course, practical nurse, radio source, refresher course, registered nurse, repulsive force, retarding force, royal air force, transparent quartz, visiting nurse

5 syllables:
tyrannosaurus, apatosaurus, ichthyosaurus, japanese iris, picornavirus, british honduras, ebola virus, bachelor of arts, centrifugal force, correspondence course, doctor of fine arts, heinrich rudolph hertz, master of fine arts, military force, security force

6 syllables:
herpes simplex virus, associate in arts, gravitational force, licensed practical nurse, magnetic line of force, orientation course, plantation walking horse, reconnaissance in force, tennessee walking horse, ultraviolet source

7 syllables:
hepatitis a virus, cytomegalovirus, american saddle horse, doctor of musical arts, electrical line of force, private security force

8 syllables:
tobacco mosaic virus, human papilloma virus

11 syllables:
human immunodeficiency virus