2 syllables:
-itious, itious, licious, rishis, vicious, vitious

3 syllables:
ambitious, ascititious, auspicious, bubblicious, capricious, cilicious, conspicious, convicious, delicious, exitious, factitious, fictitious, flagitious, girlicious, judicious, lubricious, malicious, novitious, nutritious, officious, omniscious, pactitious, pernicious, propitious, seditious, sid vicious, silicious, suspicious, sweet/vicious, tractitious, unpitious, vermicious, wrestlicious

4 syllables:
ablatitious, abstractitious, addititious, adjectitious, adscititious, adventitious, aloysius, arreptitious, artificious, ascriptitious, babelicious, blackalicious, bootylicious, cementitious, cineritious, collatitious, commentitious, conductitious, connutritious, deglutitious, deletitious, demolicious, direptitious, emissitious, exemptitious, expeditious, extispicious, fergalicious, gentilitious, icteritious, impropitious, inauspicious, injudicious, innutritious, inofficious, irreptitious, jerseylicious, lateritious, meretricious, multiplicious, natalitious, obreptitious, obstetricious, pinkalicious, precipitious, prejudicious, profectitious, red delicious, rejectitious, repertitious, repetitious, satellitious, secretitious, self-suspicious, stillatitious, subdititious, subreptitious, subventitious, superstitious, suppositious, surreptitious, tralatitious, translatitious, unambitious, unmalicious, unofficious, unpropitious, unsuspicious, veneficious

5 syllables:
artifactitious, excrementitious, golden delicious, inimicitious, overambitious, overofficious, oversuspicious, petrosilicious, recrementitious, supposititious, yellow delicious

2 syllables:
blissus, byssus, issus, nisus, visits

3 syllables:
squalidness, hawkishness, mawkishness, doggedness, narcissus

4 syllables:
recognisance, dionysus

5 syllables:
genus narcissus, parthenocissus