2 syllables:
cyrus, dyrus, gyrus, hiris, irous, jairus, pyrus, siris, tiris, tyrus, virus, xyris

3 syllables:
bucyrus, delthyris, desirous, inspire us, lathyrus, osiris, papyrus, plant virus, poxvirus, provirus, psithyrus, slow virus, subvirus

4 syllables:
alphavirus, anti-virus, antivirus, aphthovirus, arborvirus, arbovirus, astrovirus, bunyavirus, circovirus, coltivirus, echovirus, filovirus, flavivirus, hantavirus, herpesvirus, herpes virus, inovirus, kuttervirus, lentivirus, lyssavirus, megavirus, mimivirus, mycovirus, myxovirus, nairovirus, norovirus, oncovirus, parvovirus, pestivirus, phlebovirus, pithovirus, pneumovirus, potyvirus, ranavirus, reovirus, retrovirus, rhabdovirus, rhinovirus, ribovirus, rotavirus, rubivirus, sapovirus, sequivirus, simplexvirus, smallpox virus, togavirus, torovirus, tumor virus, ultravirus, undesirous, zika virus

5 syllables:
adenovirus, alfamovirus, animal virus, archaeothyris, arenavirus, arterivirus, baculovirus, billy ray cyrus, calicivirus, coronavirus, coxsackievirus, dependovirus, ebolavirus, ebola virus, enterovirus, erythrovirus, granulovirus, henipavirus, hepadnavirus, hepatovirus, luteovirus, morbillivirus, oncornavirus, orthopoxvirus, pandoravirus, papovavirus, picornavirus, poliovirus, rhadinovirus, sarbecovirus, suipoxvirus, tobamovirus, wound tumor virus

6 syllables:
aquabirnavirus, avast antivirus, herpes simplex virus, herpes zoster virus, influenzavirus, leporipoxvirus, lymphocryptovirus, mastadenovirus, metapneumovirus, orthohantavirus, orthomyxovirus, orthopneumovirus, papillomavirus, paramyxovirus, polyomavirus, varicellovirus, vesiculovirus

7 syllables:
alphacoronavirus, aviadenovirus, betacoronavirus, cytomegalovirus, deltacoronavirus, dionysus-osiris, gammacoronavirus, hepatitis a virus, orthohepadnavirus

8 syllables:
human papilloma virus, tobacco mosaic virus

9 syllables:
nucleopolyhedrovirus

11 syllables:
human immunodeficiency virus

2 syllables:
spirits, orris, terrace, naris, cirrus, doris, ferrous, horus, theorise, aurous, purus, harris, derris, norris, peeress, maurice, heiress, torus, morris, laurus, starets, morus, chorus, merits, taurus, porous, sorus, paris, carrots, ceras, cuirass, larus, parus, pirates, purace, pyrrhus, boris, burris, chloris, ferris, gerris, myrrhis, ptloris

3 syllables:
acarus, thesaurus, nereus, clitoris, honduras, millionairess, effloresce, slow loris, embarrass, liquorice, polaris, herb paris, sciurus, high spirits, arcturus, ichorous, belarus, acorus, ailurus, atherurus, baccharis, bos taurus, botaurus, centaurus, corchorus, greek chorus, hesperis, in chorus, leonurus, low spirits, luvarus, lyrurus, micrurus, necturus, paliurus, petaurus, pipturus, pylorus, quakeress, seiurus, silurus, tapirus, triturus, phalaris, prioress, psephurus, trachurus

4 syllables:
pythagoras, ardent spirits, brontosaurus, polyporus, disembarrass, stegosaurus, neutral spirits, allosaurus, ameiurus, ankylosaurus, automeris, barosaurus, byelarus, callisaurus, camptosorus, cistothorus, conilurus, cyclosorus, dasyurus, dinoceras, dipsosaurus, hadrosaurus, hydrocharis, hydrochoerus, in good spirits, in high spirits, in low spirits, menticirrhus, nigroporus, ocyurus, ophisaurus, palinurus, phylloporus, plesiosaurus, pleurosorus, polyborus, polycirrus, raphicerus, sceloporus, seismosaurus, sternotherus, tetrapturus, thryothorus, urosaurus, xenosaurus, acanthurus, chrysochloris, elaphurus, genus chloris, genus loris, genus paris, hypochaeris, pomaderris, slender loris, tetraneuris

5 syllables:
tyrannosaurus, apatosaurus, plaster of paris, ichthyosaurus, british honduras, actinomeris, alepisaurus, alopecurus, ceratosaurus, chlamydosaurus, corythosaurus, deinocheirus, edaphosaurus, edmontosaurus, eleocharis, herrerasaurus, megalosaurus, oligoporus, paradoxurus, pisanosaurus, psittacosaurus, staurikosaurus, styracosaurus, titanosaurus, agriocharis

6 syllables:
genus brontosaurus, genus stegosaurus, judgement on the merits, judgment on the merits, tamiasciurus, chamaecyparis

7 syllables:
genus tyrannosaurus, pachycephalosaurus