3 syllables:
biferous, biforous, byssiferous, yttriferous

4 syllables:
aeriferous, aliferous, armiferous, astriferous, auriferous, bacciferous, belliferous, biliferous, branchiferous, bulbiferous, calciferous, carniferous, celliferous, ceriferous, chaetiferous, cheliferous, chyliferous, chymiferous, cirrhiferous, cirriferous, cocciferous, conchiferous, coniferous, corniferous, costiferous, culmiferous, cymiferous, dentiferous, disciferous, doniferous, dorsiferous, doryphorus, ensiferous, estiferous, fatiferous, febriferous, ferriferous, fetiferous, filiferous, flammiferous, fletiferous, floriferous, fluctiferous, foliferous, foliiferous, frondiferous, fructiferous, frugiferous, fumiferous, furciferous, gemmiferous, globiferous, glumiferous, graniferous, guaniferous, gummiferous, guttiferous, gypsiferous, herbiferous, igniferous, lactiferous, lanciferous, laniferous, lauriferous, lethiferous, ligniferous, luciferous, lucriferous, lyriferous, maliferous, mammiferous, melliferous, morbiferous, mortiferous, muciferous, nimbiferous, nitriferous, noctiferous, nubiferous, nuciferous, odiferous, omniferous, opiferous, ostriferous, oviferous, palmiferous, pestiferous, piliferous, platiniferous, plumbiferous, pomiferous, poriferous, proliferous, pruniferous, quartziferous, racemiferous, radiferous, ramiferous, roriferous, rotiferous, sacciferous, saliferous, sanguiferous, scopiferous, scutiferous, sebiferous, sensiferous, septiferous, serriferous, setiferous, somniferous, soniferous, spiciferous, spiniferous, spiriferous, sporiferous, spumiferous, stanniferous, stelliferous, styliferous, succiferous, tergiferous, thuriferous, toxiferous, umbriferous, unguiferous, veliferous, viniferous, vociferous, zinciferous, zinkiferous

5 syllables:
agatiferous, amentiferous, anatiferous, antheriferous, anthraciferous, argentiferous, argilliferous, arseniferous, arundiferous, balaniferous, balsamiferous, bismuthiferous, calamiferous, calcariferous, carboniferous, celluliferous, chalaziferous, cobaltiferous, columbiferous, coralliferous, corticiferous, corymbiferous, crystalliferous, cupuliferous, diamondiferous, doloriferous, fossiliferous, garnetiferous, gemmuliferous, glanduliferous, globuliferous, glomuliferous, gossaniferous, granuliferous, hederiferous, infrugiferous, jaculiferous, lamelliferous, laminiferous, laticiferous, lignitiferous, luminiferous, magnetiferous, mammaliferous, manganiferous, melaniferous, membraniferous, metalliferous, nectariferous, nickeliferous, odoriferous, ovuliferous, ozoniferous, papilliferous, papuliferous, petaliferous, petroliferous, pistilliferous, placentiferous, polleniferous, polliniferous, polypiferous, pulmoniferous, pyritiferous, resiniferous, sacchariferous, saliniferous, salutiferous, seleniferous, semeniferous, seminiferous, siliciferous, siphoniferous, soboliferous, soporiferous, sporidiferous, staminiferous, stoloniferous, stomatiferous, succiniferous, sudoriferous, titaniferous, tridentiferous, tuberiferous, tubuliferous, umbelliferous, uriniferous, vaporiferous, veneniferous, viruliferous

6 syllables:
albuminiferous, aluminiferous, ammonitiferous, amygdaliferous, biantheriferous, bituminiferous, diamantiferous, embryoniferous, foraminiferous, gelatiniferous, margaritiferous, muriatiferous, neurosensiferous, operculiferous, subcarboniferous, tentaculiferous, turioniferous, umbraculiferous

7 syllables:
acetabuliferous, lower carboniferous, upper carboniferous

2 syllables:
terrace, cirrus, doris, ferrous, horus, virus, aurous, cyrus, purus, gyrus, peeress, heiress, pyrus, torus, morris, laurus, starets, morus, chorus, merits, taurus, porous, sorus, iris

3 syllables:
acarus, thesaurus, nereus, honduras, slow virus, millionairess, effloresce, embarrass, liquorice, polaris, desirous, sciurus, high spirits, belarus, biparous, difference, hipsurus, icarus, ignorance, inference, interests, isurus, rigorous, sistrurus, sticherus, timorous, vigorous

4 syllables:
pythagoras, ardent spirits, retrovirus, brontosaurus, polyporus, myxovirus, herpes virus, disembarrass, stegosaurus, bearded iris, tumor virus, neutral spirits, allosaurus, belligerence, brachypterous, carnivorous, deliverance, herbivorous, indifference, omnivorous, oviparous, uniparous, viviparous

5 syllables:
tyrannosaurus, apatosaurus, ichthyosaurus, japanese iris, picornavirus, british honduras, ebola virus, chaetodipterus, insectivorous

6 syllables:
herpes simplex virus, ovoviviparous, potential difference

7 syllables:
hepatitis a virus, cytomegalovirus

8 syllables:
tobacco mosaic virus, human papilloma virus

11 syllables:
human immunodeficiency virus