2 syllables:
-saurus, boris, boris', borris, chloris, chlorous, chorus, cloris, coris, dorice, doris, dorris, dorus, floris, florus, foris, forres, for us, goris, horace, horus, joris, kauris, korus, laurice, laurus, lores, loris, lorus, maurus, morice, moris, morrice, morris, morris', morriss, morus, norice, noris, norris, nourice, nourrice, orrice, orris, porous, porus, ptloris, saurus, sorice, soris, sorus, sporous, sporus, squarrous, taurus, toris, torose, torras, torus, tsoris, turris, voris, zoris

3 syllables:
acorus, authorise, before us, bos taurus, botaurus, centauress, chuck norris, clitoris, clitorus, corchorus, dean norris, delores, dolores, doloris, fitzmaurice, fitzmorris, greek chorus, in chorus, liquorice, lycoris, mantorras, mcmorris, metaurus, montgoris, mussaurus, petaurus, prioress, prochorus, pylorus, rectoress, restore us, sartoris, sepphoris, slow loris, thesaurus, three-torus, tortorice

4 syllables:
adasaurus, allosaurus, ankylosaurus, archosaurus, atlasaurus, aucasaurus, barosaurus, brontosaurus, bulbasaurus, camptosaurus, camptosorus, carnotaurus, centrosaurus, cetiosaurus, champsosaurus, chasmosaurus, chindesaurus, chrysochloris, cistothorus, crichtonsaurus, cyclosorus, dakosaurus, denversaurus, dinosaurus, diodorus, dipsosaurus, doch-an-dorris, dryosaurus, dryptosaurus, eosaurus, epidaurus, eye of horus, gasosaurus, genus chloris, genus loris, gorgosaurus, gorosaurus, hadrosaurus, hydrochoerus, hydrosaurus, kamuysaurus, kentrosaurus, kritosaurus, kronosaurus, lambeosaurus, lando norris, limaysaurus, lotosaurus, luchasaurus, lurdusaurus, lystrosaurus, mapusaurus, mauisaurus, megasaurus, mesosaurus, minotaurus, mixosaurus, morosaurus, mosasaurus, mososaurus, nanosaurus, nanuqsaurus, nigersaurus, nigroporus, nodosaurus, nothosaurus, nyctosaurus, parksosaurus, philochorus, phylloporus, plateosaurus, pleiosaurus, plesiosaurus, pleurosorus, pliosaurus, polyborus, polydorus, polyporus, poposaurus, pseudacorus, puertasaurus, purussaurus, qantassaurus, rajasaurus, saltasaurus, sarahsaurus, sarcosaurus, scelidosaurus, sceloporus, scomberomorus, scutosaurus, segnosaurus, seismosaurus, semichorus, shastasaurus, shringasaurus, shunosaurus, silesaurus, sinosaurus, slender loris, spinosaurus, stegosaurus, stellasaurus, stesichorus, suchosaurus, supersaurus, tarbosaurus, thryothorus, torosaurus, torvosaurus, tylosaurus, ultrasaurus, urosaurus, vespersaurus, wuerhosaurus, xenosaurus

5 syllables:
achelousaurus, alamosaurus, albertosaurus, alectrosaurus, amargasaurus, ampelosaurus, amurosaurus, anteosaurus, apatosaurus, artemidorus, athenodorus, bajadasaurus, basilosaurus, brachiosaurus, cadborosaurus, camarasaurus, cassiodorus, ceratosaurus, charonosaurus, chlamydosaurus, corythosaurus, cristatusaurus, cyclotosaurus, daemonosaurus, daspletosaurus, dicraeosaurus, dilophosaurus, dolichosaurus, dromaeosaurus, dyoplosaurus, edaphosaurus, edmontosaurus, einiosaurus, elaphrosaurus, elasmosaurus, erlikosaurus, eunotosaurus, europasaurus, futabasaurus, gigantosaurus, gojirasaurus, heliodorus, herrerasaurus, huayangosaurus, hylaeosaurus, icarosaurus, ichthyosaurus, isanosaurus, laetiporus, lesothosaurus, lufengosaurus, magyarosaurus, majungasaurus, maquiladoras, mastodonsaurus, megalosaurus, nipponosaurus, nyasasaurus, oligoporus, ophiotaurus, ophthalmosaurus, paleosaurus, panoplosaurus, pinacosaurus, pisanosaurus, proterosaurus, psittacosaurus, qianzhousaurus, rapetosaurus, savannasaurus, scutellosaurus, shantungosaurus, siamosaurus, sonorasaurus, staurikosaurus, styracosaurus, teleosaurus, tenontosaurus, teratosaurus, tetragonurus, thescelosaurus, titanosaurus, trematosaurus, turiasaurus, tyrannosaurus, uredosorus, yangchuanosaurus, zephyrosaurus

6 syllables:
acrocanthosaurus, anodontosaurus, appalachiosaurus, argentinosaurus, arizonasaurus, bahariasaurus, bruhathkayosaurus, camarillasaurus, cryolophosaurus, eromangasaurus, futalognkosaurus, genus brontosaurus, genus stegosaurus, giganotosaurus, gigantspinosaurus, haplocanthosaurus, incisivosaurus, metridiochoerus, monolophosaurus, muttaburrasaurus, ouranosaurus, pachyrhinosaurus, petrolacosaurus, proceratosaurus, pycnonemosaurus, sigilmassasaurus, sinornithosaurus, stenonychosaurus, temnodontosaurus, thecodontosaurus, therizinosaurus, tuojiangosaurus

7 syllables:
carcharodontosaurus, ekrixinatosaurus, genus tyrannosaurus, heterodontosaurus, metriacanthosaurus, pachycephalosaurus

9 syllables:
micropachycephalosaurus

2 syllables:
interests, aurous, carrots, ceras, cirrus, cuirass, cyrus, ferrous, gyrus, heiress, iris, larus, merits, parus, pirates, purace, purus, pyrrhus, pyrus, starets, terrace, virus

3 syllables:
ignorance, vigorous, cyperus, icarus, timorous, rigorous, inference, difference, icterus, ailurus, arcturus, atherurus, baccharis, belarus, centaurus, desirous, dutch iris, dwarf iris, embarrass, hesperis, high spirits, honduras, lathyrus, leonurus, low spirits, luvarus, lyrurus, micrurus, necturus, paliurus, papyrus, pipturus, plant virus, polaris, psithyrus, quakeress, sciurus, seiurus, silurus, slow virus, tapirus, triturus

4 syllables:
viviparous, brachypterous, pestiferous, deliverance, oviparous, bacciferous, indifference, omnivorous, palinurus, vociferous, auriferous, coniferous, belligerence, herbivorous, carnivorous, ameiurus, ardent spirits, automeris, bearded iris, bulbous iris, byelarus, callisaurus, conilurus, dasyurus, dinoceras, disembarrass, echovirus, english iris, genus iris, german iris, herpes virus, hydrocharis, in good spirits, in high spirits, in low spirits, menticirrhus, myxovirus, neutral spirits, ocyurus, parvovirus, persian iris, polycirrus, raphicerus, reovirus, retrovirus, rhabdovirus, smallpox virus, spanish iris, sternotherus, stinking iris, tetrapturus, tumor virus, undesirous, vernal iris, yellow iris

5 syllables:
insectivorous, carboniferous, actinomeris, alepisaurus, alopecurus, animal virus, british honduras, dalmatian iris, deinocheirus, ebola virus, eleocharis, florentine iris, japanese iris, paradoxurus, poliovirus, wound tumor virus

6 syllables:
potential difference, ovoviviparous, herpes simplex virus, herpes zoster virus, judgement on the merits, judgment on the merits, orthomyxovirus, paramyxovirus, tamiasciurus

7 syllables:
upper carboniferous, cytomegalovirus, hepatitis a virus

8 syllables:
human papilloma virus, tobacco mosaic virus

11 syllables:
human immunodeficiency virus