2 syllables:
chronos, faunus, glonass, jaunisse, john huss, maness, monas, nonis, nonose, on us, praunus, quantise, rawness, sourness, taunus, wanness, wrawness

3 syllables:
adonis, aepyornis, alanis, aphonous, biryanis, bodanis, campanis, canonise, drepanis, fulanis, galanis, ichthyornis, kiwanis, preconise, prytanis, sayornis, symphonise, upon us, varanus

4 syllables:
allochthonous, anchiornis, anthropornis, autochthonous, cacophonous, cassivelaunus, destefanis, epiornis, hesperornis, hindustanis, hypertonus, monophonous, pabianice, pentagonous, pocahontas, polyphonous, uniphonous

5 syllables:
confuciusornis, dzharatitanis, heterochthonous, inviolaness, megalophonous

6 syllables:
ibero-mesornis

2 syllables:
phlomis

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

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