2 syllables:
billo, billow, bill o, bilow, brillo, chillo, chilo-, chiloe, chylo, cillo, dillo, dillow, fillo, giloh, grillo, hillo, killow, kilo-, kyllo, lillo, millo, phyllo, phyllo-, pillow, schillo, smilo, smilow, spillo, squillo, still low, still owe, tillow, trillo, will owe, zillow

3 syllables:
anillo, badillo, barillo, barquillo, bed pillow, blanquillo, bolillo, bolsillo, bordillo, branillo, bustillo, cabrillo, cadillo, calvillo, camillo, canillo, cardillo, carillo, carrillo, casillo, castillo, caudillo, cedillo, cepillo, chanquillo, cirillo, colmillo, cuchillo, cursillo, cutillo, delillo, demilo, embillow, frank grillo, fresnillo, gordillo, grandillo, granillo, kurylo, ladrillo, lanzillo, long pillow, martillo, melillo, membrillo, mendillo, mongillo, morillo, morvillo, murillo, murmillo, mypillow, negrillo, nudillo, oscillo, palillo, parillo, parrillo, pasillo, patillo, pattillo, perillo, pestillo, petillo, petrillo, pimpillo, piquillo, pirillo, pontillo, portillo, pucillo, quesillo, rastrillo, ronquillo, saltillo, santillo, sedillo, sencillo, sigillo, spondylo, tantillo, throw pillow, tobillo, tomillo, tornillo, tranquillo, tresillo, trompillo, truxillo, tuccillo, utrillo, vallecillo, ventrilo, vespillo, zadillo, zedillo, zorrillo

4 syllables:
alamillo, amarillo, angelillo, armadillo, astudillo, barbadillo, bocadillo, caimitillo, camarillo, canutillo, capetillo, carrasquillo, chikatilo, cigarillo, cochinillo, coyotillo, decamillo, delcastillo, delgadillo, dicamillo, enriquillo, estribillo, fiorillo, frijolillo, granadillo, grenadillo, hermosillo, jaboncillo, jaramillo, limoncillo, mamoncillo, manzanillo, ocotillo, paolillo, pastelillo, peccadillo, pepinillo, picadillo, piccirillo, piloncillo, russolillo, sapadillo, solomillo, tamarillo, tempranillo

5 syllables:
andi petrillo, biondolillo, coloradillo, mary carillo, pedro castillo

6 syllables:
adelantadillo, fairy armadillo, giant armadillo, texas armadillo

2 syllables:
kilo, willow

3 syllables:
bay willow, black willow, bush willow, crack willow, dwarf willow, goat willow, gray willow, hemp willow, red willow, sage willow, snap willow, swamp willow, white willow

4 syllables:
almond willow, arctic willow, balsam willow, basket willow, brittle willow, creeping willow, desert willow, dwarf gray willow, golden willow, hoary willow, laurel willow, prairie willow, purple willow, pussy willow, shining willow, silky willow, silver willow, sitka willow, weeping willow

5 syllables:
arroyo willow, huntingdon willow

7 syllables:
wisconsin weeping willow

9 syllables:
babylonian weeping willow