2 syllables:
asses, bass's, brasses, chasses, class's, classes, class is, fasces, gas's, gases, gasses, gas is, glass's, glasses, glass is, grasses, grass is, lases, lasses, maces, masses, mass is, nasa's, passes, pass his, pass is, sases, sasses, tasses, wrasses, aces, base's, bases, base his, base is, brace's, braces, case's, cases, case his, case is, chase's, chases, daces, faces, face his, face is, grace's, graces, grace is, laces, mesa's, naces, nueces, pace's, paces, pace is, pases, place's, places, place his, place is, race's, races, race is, rases, spaces, space is, stases, tases, traces, trace his, trace is, vases

3 syllables:
agassiz, amasses, bypasses, crevasses, dark glasses, eyeglasses, fatasses, field glasses, harasses, impasses, jackasses, landmasses, melasses, molasses, morasses, outclasses, outgasses, paillasses, protases, repasses, seagrasses, smartglasses, spyglasses, subclasses, sunglasses, surpasses, tear-gases, thoraces, topasses, trespasses, wineglasses, abases, airspaces, arsaces, atlases, backspaces, birthplaces, blackfaces, boldfaces, bookcases, bootlaces, braincases, briefcases, carcases, coalfaces, crankcases, debases, defaces, disgraces, displaces, dogfaces, effaces, embraces, emplaces, encases, enlaces, erases, fireplaces, footraces, fracases, freebases, headcases, incases, man-e-faces, misplaces, namespaces, nutcases, oaces, outfaces, outpaces, outraces, primefaces, replaces, retraces, retrace his, run bases, scapegraces, shoelaces, showcases, showplaces, slipcases, small faces, staircases, suitcases, sybase's, teresa's, theresa's, typefaces, unbraces, unlaces, upases, vambraces, wheelbases, workplaces, workspaces

4 syllables:
boardingpasses, demitasses, gallowglasses, hourglasses, opera glasses, overpasses, sassafras's, sassafrases, underclasses, underpasses, about-faces, acinaces, aerospace's, amylases, anabases, bonifaces, carapaces, catabases, cellulases, colipases, commonplaces, cyberspace's, databases, diastases, double-spaces, epistases, esterases, firebases, hypostases, interfaces, interlaces, interspaces, kilobases, lady's laces, marketplace's, marketplaces, metabases, nucleases, palefaces, parabases, pillowcases, steeplechases, sulfatases

5 syllables:
sorghum molasses, homeostases, isomerases, luciferases, myeloplaces, osteoclases, oxygenases, polymerases

6 syllables:
dehydrogenases, dioxygenases, exonucleases, topoisomerases

7 syllables:
arterial blood gases, olympic sailing classes

8 syllables:
kinetic theory of gases

2 syllables:
phrases, ashes, flashes, phases, clashes, crashes, blazes, praises, raises

3 syllables:
amazes