2 syllables:
appar, apper, capper, chapar, clapper, crapper, dapper, flapper, frapper, gapper, happer, hapur, japer, japper, kapper, kapur, klapper, knapper, lapar, laper, lapper, mapper, napper, papper, sapper, schnapper, scrapper, shapur, slapper, slap her, snapper, strapper, tapper, trapper, whapper, wrapper, wrap her, yapper, zapper

3 syllables:
attraper, backslapper, bishapur, catnapper, didapper, dimapur, divedapper, dognapper, dust wrapper, empapar, gray snapper, hog snapper, kidnaper, kidnapper, knee-slapper, kolhapur, portmapper, ranakpur, recapper, red snapper, thigh-slapper, uncapper, wit-snapper

4 syllables:
citymapper, handicapper, mangrove snapper, megan tapper, mutton snapper, understrapper, whippersnapper, wiretapper

6 syllables:
alligator snapper

2 syllables:
cracker, spatter, smacker, chatter, bagger, satyr, packer, shatter, latter, swagger, slacker, jabber, whacker, backer, splatter, attar, scatter, nagger, jagger, batter, hacker, mater, tracker, tatter, tabour, stagger, knacker, madder, natter, platter, blabber, flatter, clatter, tatar, patter, dagger, adder, bladder, clabber, smatter, grabber, stabber, catarrh, hatter, ladder, jaeger, matter, slabber, lacquer, ratter, bader, bakker, faqir, pabir

3 syllables:
attacker, bespatter, white matter, puff adder, fish ladder, front matter, rope ladder, swim bladder, gray matter, air bladder, back matter, grey matter, death adder, backscatter, cat cracker, end matter, jack ladder, line backer, milk adder, no matter, puff batter, sea ladder, step ladder, the matter, vannatter, waste matter, white madder, wild madder

4 syllables:
oyster cracker, state of matter, double dagger, scaling ladder, soda cracker, subject matter, jacob's ladder, graham cracker, spanish dagger, banded adder, cannon cracker, checkered adder, cloak-and-dagger, fecal matter, flaccid bladder, fritter batter, mongol tatar, monkey ladder, pancake batter, pilot ladder, pitter-patter, spin the platter, turko-tatar, written matter

5 syllables:
extension ladder, aerial ladder, crux of the matter, indian madder, textual matter

6 syllables:
catalytic cracker, urinary bladder, northern jacob's ladder, pictorial matter

7 syllables:
accommodation ladder, conservation of matter

9 syllables:
law of conservation of matter