2 syllables:
blether, pethor, sethur, shethar

3 syllables:
denethor

4 syllables:
polyether

2 syllables:
aesir, aether, chevre, clever, dresser, ever, feather, fresher, heather, heifer, leather, leisure, lesser, lessor, lever, measure, nether, never, pleasure, pressure, sever, tether, tevere, thresher, treasure, trevor, weather, wether, whether, zephyr

3 syllables:
aggressor, air pressure, assessor, at leisure, bad weather, beach heather, bell heather, blood pressure, board measure, carrefour, cold weather, compressor, confessor, crushed leather, depressor, displeasure, dry measure, endeavor, endeavour, fair weather, false heather, flight feather, foot lever, forever, gayfeather, good weather, guenevere, high-pressure, high pressure, hot weather, however, long measure, lopressor, low pressure, oil pressure, ooze leather, oppressor, possessor, professor, quill feather, raw weather, refresher, scots heather, sea feather, shoe leather, sound pressure, square measure, successor, suppresser, suppressor, tape measure, together, transgressor, wash leather, whatever, whenever, wherever, whichever, white feather, white heather, white leather, whit leather, whoever, whomever, yard measure

4 syllables:
acupressure, add together, air compressor, all together, altogether, band together, bring together, bunch together, cantilever, clap together, close together, come together, common measure, compound lever, contour feather, crowd together, cubic measure, desperate measure, draw together, fudge together, full professor, get together, golden heather, gold of pleasure, hang together, high blood pressure, lash together, league together, liquid measure, live-forever, pack together, patent leather, piece of leather, princess feather, pull together, purple heather, put together, russia leather, saddle feather, sew together, sickle feather, slap together, spike suppressor, stay together, stick together, surge suppressor, tax assessor, throw together, vapor pressure, whatsoever, window dresser

5 syllables:
calling together, circular measure, cobble together, coming together, compartment pressure, defensive measure, english professor, huddle together, lady of pleasure, linear measure, living together, osmotic pressure, primary feather, sexual pleasure, withersoever

6 syllables:
arterial pressure, assistant professor, atmospheric pressure, barometric pressure, brewer's mountain heather, bringing close together, capacity measure, diastolic pressure, imitation leather, information measure, in the altogether, radiation pressure, visiting professor

7 syllables:
associate professor

8 syllables:
instantaneous sound pressure

9 syllables:
acoustic radiation pressure