Words That Rhyme With "Rigorous" :

3 syllables:

biparous, dimerous, dipterous, Icarus, icterus, ignorance, jiggermast, Megarus, timorous, vigorous, whisperous

4 syllables:

aeriferous, apivorous, armigerous, auriferous, bacciferous, baccivorous, brachycerous, brachypterous, calciferous, carnivorous, cheliferous, conchiferous, coniferous, considerance, cruciferous, dorsiferous, facinorous, ferriferous, fetiparous, fissiparous, floriferous, foetiparous, fructiferous, frugivorous, fungivorous, gemmiferous, gemmiparous, granivorous, gypsiferous, hemipterous, herbivorous, invigorate, lactiferous, larviparous, larvivorous, lethiferous, luciferous, mammiferous, melliferous, merdivorous, mortiferous, muciferous, multiparous, nulliporous, omnivorous, oviparous, pestiferous, piliferous, piscivorous, plumbiferous, polymerous, pomiferous, poriferous, proliferous, Protagoras, pupiparous, quartziferous, saliferous, sanguivorous, setigerous, somniferous, soniferous, splendiferous, uniparous, vermivorous, viniferous, viviparous, vociferous, zinciferous

5 syllables:

amentiferous, Anaxagoras, argentiferous, argilliferous, balsamiferous, carboniferous, fossiliferous, gemmuliferous, globuliferous, graminivorous, insectivorous, laticiferous, luminiferous, mammaliferous, melaniferous, nectariferous, nickeliferous, odoriferous, ozoniferous, polliniferous, resiniferous, sacchariferous, salutiferous, seminiferous, seminivorous, soporiferous, staminiferous, stoloniferous, sudoriferous, sudoriparous, umbelliferous

6 syllables:

aluminiferous, diamantiferous, ovoviviparous, phytosuccivorous, semioviparous