2 syllables:
cenus, cleanness, enos, finess, freeness, genus, lenis, linas, minas, penis, penus, rhenus, seen us, shiness, thenus, venous, venus, weeness

3 syllables:
acinus, albinus, alienus, anguinus, anthrenus, balbinus, between us, bird genus, bolinas, brachinus, burhinus, caninus, cardenas, carefreeness, carinus, carpinus, circinus, colinas, colinus, comnenus, cosinus, cotinus, cutesiness, delphinus, dominus, fern genus, fish genus, form genus, galenus, gallienus, gallinas, gambrinus, gyrinus, helenus, hygienise, hygienists, lentinus, longinus, lupinus, malvinas, marbrinus, marinus, martinus, moss genus, orcinus, pantaenus, parvenus, paulinus, pinguinus, plant genus, proteinous, pupienus, quirinus, ricinus, saguinus, salinas, salinas', selenous, selinas, sereness, serinus, silenus, sponge genus, subgenus, ticinus, truthiness, type genus, uncinus, uncleanness, ursinus, worm genus

4 syllables:
antoninus, callorhinus, carcharhinus, censorinus, cetorhinus, chemainus, dicerorhinus, endovenous, envy-freeness, florentinus, fungus genus, gediminas, genus venus, hemipenis, intravenous, macropenis, mammal genus, micropenis, mollusk genus, muscardinus, mycerinus, nesorhinus, odobenus, peregrinus, philippinus, pseudo-penis, reptile genus, rosmarinus, saloninus, salvelinus, severinus, sterquilinus, thylacinus, trigeminus, usiminas, valentinus, vein of penis, vena genus, zigadenus

5 syllables:
arthropod genus, galeorhinus, neolentinus, quadrigeminus, stephanorhinus

6 syllables:
amphibian genus, arteriovenous, bacteria genus, proterogyrinus

2 syllables:
peanuts, remus

3 syllables:
emphasis, nebulous, elements, hephaestus, tetanus, sedulous, petulance, offenseless, fecklessness, membranous, restlessness, excellence, exodus, evidence, pendulous, recklessness, edifice, detritus, blessedness, helplessness, renascence, precedence, helpfulness, pestilence, tremulous, prevalence, eminence, tenebrous, fretfulness, aesculus, pegasus, endlessness, resinous, credulous, resonance, dreadfulness, elephants, eloquence, pleasantness, regulus, daedalus, gentleness, healthfulness, precipice, petalous, specialness, negligence, tendinous, tenuous, emulous, femaleness, genesis, xenopus, venomous, benelux, elegance, relevance

4 syllables:
contentiousness, benevolence, inelegance, antecedence, preeminence, beneficence, unpleasantness, affectedness, apetalous, directionless, edematous, shigellosis, state's evidence, maleficence, pink elephants, persepolis, incredulous, irrelevance, intelligence, malevolence, eleven-plus, necessitous, apodemus

5 syllables:
macrocephalous, leptocephalus, atelectasis, conscientiousness, hearsay evidence, hydrocephalus, direct evidence, microcephalous, overemphasis

6 syllables:
magnetic resonance, indirect evidence, dicotyledonous

7 syllables:
circumstantial evidence

8 syllables:
artificial intelligence