2 syllables:
aro, baro, barro, caro, carro, charo, charro, claro, farro, garro, haro, karow, maro, marro, naro, paro, parro, pharo, sarro, sbarro, searo, skaro, sorrow, sparo, starro, storrow, tarro, varo, varro, yarrow, zarro, chloro, choro, chorro, cloro, corro, corrow, doro, dorow, dorroh, floro, forero, forro, four row, gorro, lauro, loro, mauro, morro, nuoro, nyoro, oro, phoro, porro, sauro, scoro, sporo, tauro, tauro-, thoro, thorough, thorow, toro

3 syllables:
albaro, alfaro, alvaro, amaro, amparo, aparo, arcaro, armaro, asaro, avaro, azzaro, barbaro, bavaro, bizarro, bizzaro, blepharo, bucaro, cafaro, caparro, capraro, cassaro, catarro, cattaro, cesaro, cestaro, chaparro, chiaro, chicharro, cigarro, coccaro, coffaro, comaro, cordaro, corsaro, cuccaro, dasaro, decaro, denaro, dodaro, egaro, favaro, ferarro, ferraro, funaro, furfaro, fusaro, gasbarro, gasparro, genaro, gennaro, gibaro, guacharo, guitarro, hamtaro, hanaro, hellaro, icaro, ignaro, imaro, jibaro, jivaro, k.maro, keitaro, kentaro, kohtaro, kotaro, lautaro, lazaro, lazzaro, lesharo, litaro, lofaro, manjaro, mascaro, massaro, mataro, moonsorrow, navarro, nazzaro, notaro, pajaro, panaro, passaro, patzcuaro, pesaro, pissarro, pizarro, pizzaro, porcaro, recaro, rintaro, ryutaro, sahuaro, scalfaro, scolaro, seek-sorrow, setaro, shintaro, sodaro, spadaro, spataro, stagnaro, tafaro, tammaro, tartaro, todaro, tomaro, totaro, tsintskaro, ungaro, vaccaro, varvaro, zaccaro, zingaro, zuccaro, adoro, ahorro, alloro, bororo, bunyoro, cachorro, camauro, castoro, chamorro, decoro, delauro, deltoro, demauro, deorro, dilauro, dimauro, dynoro, etoro, gogoro, kohtoro, kokoro, lavoro, mascorro, mcmorrow, mindoro, mokoro, montoro, nagoro, okoro, oophoro, pandoro, poporo, pyloro, rapport aux, reborrow, saguaro, santoro, sapporo, shiroro, socorro, sokoro, sonoro, tesauro, tesoro, to-morrow, totoro, xenforo

4 syllables:
bodo-garo, bordonaro, calderaro, campanaro, cannistraro, cannizzaro, carbonaro, catanzaro, cavagnaro, cavallaro, chanhudaro, degennaro, digennaro, famularo, manganaro, marinaro, mogavaro, molinaro, momotaro, montanaro, mortellaro, neevevaro, overmorrow, oversorrow, pagliaro, paninaro, pecoraro, pignataro, posteraro, quartararo, queretaro, shippeitaro, tig notaro, tupamaro, utamaro, yoko taro, abejorro, bangsamoro, comodoro, cristoforo, dinosauro, favaloro, isidoro, litochoro, minotauro, montedoro, morogoro, nagatoro, polidoro, pomodoro, poroporo, teodoro, tocororo, vanikoro, villatoro

5 syllables:
conigliaro, decristofaro, finocchiaro, jair bolsonaro, kilimanjaro, lakhan-jo-daro, mohenjo-daro, mohenjodaro, negroamaro, diponegoro, dorohedoro, nikumaroro, upokororo

6 syllables:
chevrolet camaro, mount kilimanjaro, guillermo del toro, my neighbor totoro

2 syllables:
sparrow, arrow, euro, taro, burro, burrow, biro, narrow, serow, harrow, hero, beroe, bureau, gyro, miro, borrow, borough, farrow, pharaoh, zero, spiro, barrow, faro, furrow, cairo, marrow, darrow, pirro

3 syllables:
hedge sparrow, bone marrow, tomorrow, torero, song sparrow, dinero, broad arrow, bolero, vaquero, tree sparrow, house sparrow, straight arrow, disk harrow, sombrero, cruzeiro, deniro, disc harrow, field sparrow, janeiro, passero, restharrow, shapiro, swamp sparrow, true sparrow

4 syllables:
java sparrow, credit bureau, autogiro, vesper sparrow, service bureau, weather bureau, straight and narrow, autogyro, english sparrow, antihero, rotten borough, pocket borough, bow and arrow, aleph-zero, cape passero, census bureau, chipping sparrow, giant taro, golden yarrow, new world sparrow, rabbit burrow

5 syllables:
chiaroscuro, banderillero, vegetable marrow, absolute zero

6 syllables:
rio de janeiro

7 syllables:
california romero

8 syllables:
italian vegetable marrow