2 syllables:
bopper, chopper, clopper, copper, cropper, dapre, dapur, dopper, dropper, drop her, flopper, gawper, graaper, gropper, hopper, kopper, lopper, mopper, nopper, opper, pauper, popper, proper, propper, shahpur, shopper, sopor, sopper, stopper, stop her, swapper, topor, topper, wapper, whopper, yauper, yawper

3 syllables:
atop her, bebopper, cartopper, chart-topper, clodhopper, daryapur, dispauper, doorstopper, eavesdropper, evesdropper, eye-popper, eyedropper, eyepopper, eye dropper, flip-flopper, froghopper, grasshopper, hedgehopper, hilltopper, improper, joypopper, landloper, leaf-hopper, leafhopper, name-dropper, namedropper, no-hoper, planthopper, plant hopper, rockhopper, rock hopper, sandhopper, sand hopper, scotch-hopper, sharecropper, show-stopper, showstopper, sinoper, sitapur, skatestopper, skin-popper, starhopper, tom hopper, treehopper, unstopper, woodchopper

4 syllables:
belly whopper, blister copper, table-hopper, teeny-bopper, teenybopper, william hopper, window-shopper

5 syllables:
cadiddlehopper, tin-silver-copper

6 syllables:
american copper

7 syllables:
migratory grasshopper

2 syllables:
blocker, blotter, bobber, clobber, cobber, cocker, cotter, docker, dodder, fodder, hotter, jobber, jogger, jotter, knocker, laager, lager, laugher, locker, logger, mater, mocker, ocher, otter, plodder, plotter, potter, robber, rocker, rotter, shocker, slobber, slogger, soccer, solder, spotter, squatter, stocker, swatter, totter, trotter

3 syllables:
brontosaur, sloganeer, hosteller, monitor, hollander, godmother, nodular, polymer, proposer, jocular, cockchafer, sodbuster, popular, cocklebur, modeler, hogchoker, goddaughter, commodore, colander, columnar, alcazar, oliver, blockbuster, pompadour, bolivar, gospeler, modeller, monomer, commissar, globular, onager, almoner, stomacher, gobbler, gossamer, commoner, nonpolar, pothunter, conifer, nothosaur, gossiper, slopseller, camp robber, flyswatter, footslogger, hard solder, macabre, minotaur, punk rocker, saltwater, sea otter, sea robber, soft-solder, soft solder, stockjobber, valve rocker

4 syllables:
biographer, atmometer, picometer, spectrometer, cryometer, psychrometer, tachometer, spherometer, manometer, astronomer, algometer, hodometer, unpopular, decametre, bilocular, demographer, photographer, pornographer, binocular, clinometer, bolometer, philosopher, kilometer, astrologer, speedometer, subocular, thermometer, geographer, reconciler, odometer, siphonophore, hygrometer, chronometer, micrometer, hydrometer, alma mater, annunciator, beta blocker, boston rocker, cannon fodder, dura mater, graverobber, imprimatur, jewels-of-opar, magna mater, pettifogger, pia mater, platform rocker, police blotter, river otter, silver solder, storage locker

5 syllables:
interlocutor, lexicographer, gas thermometer, salinometer, densitometer, myriameter, choreographer, piezometer, variometer, ovipositor, dynamometer, anemometer, katharometer, mass spectrometer, audiometer, mileometer, vinyl polymer, goniometer, galvanometer, sensitometer, inclinometer, actinometer, declinometer, tacheometer, magnetometer, calcium blocker, eurasian otter, histamine blocker

6 syllables:
interferometer, autobiographer, accelerometer, cinematographer, sphygmomanometer, evaporometer, telethermometer, davy jones's locker

7 syllables:
clinical thermometer, resistance thermometer, radiomicrometer

8 syllables:
electrodynamometer

9 syllables:
radio interferometer