3 syllables:
chyometer, cometer, mhometer, pneometer, prometer, promettre, vomitar, vomiter

4 syllables:
acometer, airometer, algometer, altometer, arthrometer, astrometer, atmometer, attometer, auxometer, axometer, barometer, bathometer, bdellometer, biometer, bogometer, breathometer, capnometer, ceilometer, chartometer, chondrometer, chromometer, chronometer, clapometer, comptometer, conchometer, coolometer, cratometer, cryptometer, cymometer, cyrtometer, cytometer, dendrometer, disdrometer, drosometer, drunkometer, durometer, echometer, femtometer, fluorometer, flushometer, focometer, geometer, glaucometer, gleucometer, glucometer, graphometer, haemometer, haptometer, hectometer, hektometer, hodometer, horometer, hydrometer, hygrometer, hypsometer, iometer, kilometer, lactometer, lensometer, mecometer, meldometer, metrometer, micrometer, monometer, nephometer, nitrometer, octometer, odometer, ombrometer, oncometer, ondometer, optometer, orometer, osmometer, pachometer, pedometer, phacometer, phonometer, phorometer, photometer, phthongometer, picometer, pitchometer, plastometer, platometer, pneumometer, potometer, psophometer, psychometer, psychrometer, pulmometer, pycnometer, pyknometer, pyrometer, quantometer, reometer, rheometer, riometer, sclerometer, scotometer, seismometer, sismometer, slidometer, spectrometer, speedometer, spherometer, sphigmometer, sphygmometer, spirometer, stactometer, stagmometer, staktometer, stethometer, strainometer, stylometer, swingometer, tachometer, tactometer, termometer, thermometer, tintometer, tocometer, trechometer, trekometer, tribometer, trochometer, tromometer, tropometer, udometer, urometer, vibrometer, viscometer, worldometer, xylometer, zymometer

5 syllables:
aberrometer, acetometer, acidometer, adaptometer, air thermometer, albedometer, alcohometer, aleurometer, ametrometer, amperometer, amylometer, anemometer, angulometer, anthracometer, apertometer, araeometer, areometer, arithmometer, astigmometer, atmidometer, audiometer, azotometer, butyrometer, carbonometer, cardiometer, cathetometer, chromatometer, chromoptometer, craniometer, declinometer, deflectometer, densitometer, diagometer, diffractometer, dilatometer, dioptometer, dynamometer, eikonometer, elaeometer, elaiometer, elatrometer, electrometer, ellipsometer, endosmometer, eriometer, eudiometer, extensometer, fluviometer, galactometer, gas thermometer, glycosometer, goniometer, gradiometer, gravitometer, haemadrometer, haematometer, harmonometer, heliometer, hemadrometer, hyetometer, iconometer, inclinnometer, inclinometer, inductometer, infiltrometer, inspirometer, katharometer, kathetometer, keratometer, labidometer, magnetometer, mass spectrometer, meat thermometer, methanometer, micronometer, mileometer, nauropometer, nephelometer, odynometer, oleometer, olfactometer, ophthalmometer, opisometer, opsiometer, orchidometer, oscillometer, ozonometer, penetrometer, piezometer, pluviometer, pneumatometer, pupillometer, pupilometer, pyrgeometer, rachiometer, radiometer, reflectometer, reflexometer, refractometer, respirometer, rhythmometer, roentgenometer, saccharometer, salinometer, scatterometer, scoliometer, sensitometer, sociometer, stadiometer, stalagmometer, strabismometer, tacheometer, taseometer, tellurometer, tensiometer, thoracometer, tithonometer, torsiometer, urinometer, variometer, weatherometer

6 syllables:
absorptiometer, accelerometer, aesthesiometer, albuminometer, apomecometer, arteriometer, astrophotometer, beckman thermometer, bronchospirometer, candy thermometer, chronothermometer, cubic kilometer, cytophotometer, decelerometer, diaphanometer, diathermometer, diffusiometer, ebulliometer, effusiometer, elaterometer, esthesiometer, eurobarometer, evaporometer, exophthalmometer, gastrotonometer, geothermometer, haemacytometer, haematachometer, haemochromometer, haemocytometer, hemacytometer, hemadromometer, hemocytometer, interferometer, intervalometer, katathermometer, kinesiometer, meteorometer, microchronometer, microphotometer, microseismometer, nephelodometer, oven thermometer, pantochronometer, parallelometer, parturiometer, perineometer, photographometer, platinum thermometer, potentiometer, pyrheliometer, pyrophotometer, spectrobolometer, spectrofluorometer, spectrophotometer, sphygmotonometer, telethermometer, thermobarometer, thermohydrometer, ultramicrometer, volumenometer

7 syllables:
baraesthesiometer, baresthesiometer, barocyclonometer, cardiotachometer, centigrade thermometer, clinical thermometer, electric thermometer, erythrocytometer, fahrenheit thermometer, gnathodynamometer, hemadynamometer, hemoglobinometer, hydrodynamometer, kinesthesiometer, lactobutyrometer, mercury barometer, mercury thermometer, microdensitometer, myodynamometer, oligochronometer, photoheliometer, pupillostatometer, radiomicrometer, resistance thermometer, reversing thermometer, spectroradiometer, thermesthesiometer, thermoelectrometer, tocodynamometer, vernier micrometer, volta-electrometer

8 syllables:
electro-dynamometer, electrodynamometer, microspectrophotometer, ophthalmodynamometer, radiogoniometer, telehydrobarometer

9 syllables:
radio interferometer

11 syllables:
maximum and minimum thermometer

2 syllables:
seeder, detour, bleeder, chequer, beeper, cedar, meager, meagre, reaper, keeper, eager, breeder, beaker, feeder, squeaker, streaker, peeper, creeper, seeker, weeper, sleeper, speeder, leader, sneaker, t-bar, speaker, reader, wheatear, eagre, sweeper

3 syllables:
grim reaper, lip reader, beleaguer, loss leader, white cedar, red cedar, lay reader, besieger, floor leader, mind reader, chronicler, dropkicker, hop-picker, moniker, oliver, polisher, polypore, rotifer, shoplifter, somme river

4 syllables:
carpet sweeper, incense cedar, spanish cedar, atlas cedar, admonisher, canopic jar, depositor

5 syllables:
eastern red cedar, western red cedar, japanese cedar, port orford cedar, ovipositor

6 syllables:
majority leader, minority leader