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

3 syllables:
honduras, acarus, slow virus, millionairess, polaris, desirous, belarus, sciurus, high spirits, arcturus, ichorous, nereus, embarrass, ailurus, atherurus, baccharis, centaurus, dutch iris, dwarf iris, hesperis, lathyrus, leonurus, low spirits, luvarus, lyrurus, micrurus, necturus, paliurus, papyrus, pipturus, plant virus, psithyrus, quakeress, seiurus, silurus, tapirus, triturus

4 syllables:
myxovirus, bearded iris, neutral spirits, tumor virus, herpes virus, disembarrass, ardent spirits, retrovirus, ameiurus, automeris, bulbous iris, byelarus, callisaurus, conilurus, dasyurus, dinoceras, echovirus, english iris, genus iris, german iris, hydrocharis, in good spirits, in high spirits, in low spirits, menticirrhus, ocyurus, palinurus, parvovirus, persian iris, polycirrus, raphicerus, reovirus, rhabdovirus, smallpox virus, spanish iris, sternotherus, stinking iris, tetrapturus, undesirous, vernal iris, yellow iris

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

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

7 syllables:
cytomegalovirus, hepatitis a virus

8 syllables:
tobacco mosaic virus, human papilloma virus

11 syllables:
human immunodeficiency virus