Following are all the thingum like words, in the list below.
WHATCHAMAHOOZIE
100% like thingum
JIGAMAREE
100% like thingum
TWADDLEMENT
100% like thingum
MUMBLEMENT
99.99% like thingum
FLAPDOODLE
99.99% like thingum
TWADDLEDOM
99.99% like thingum
RUMPTY-TUMPTY
99.99% like thingum
THUMBER
99.99% like thingum
FLUBDUBBERY
99.98% like thingum
FIGGUM
99.98% like thingum
THUMPER
99.98% like thingum
GUM STICK
99.98% like thingum
STUMPLING
99.98% like thingum
THUMBLING
99.97% like thingum
MUTTERING
99.97% like thingum
TWADDLING
99.97% like thingum
TUM-TUM
99.97% like thingum
WHOOPY-DOO
99.97% like thingum
HEFFALUMP
99.96% like thingum
BIBBLEBABBLE
99.96% like thingum
THUMB
99.96% like thingum
SKIMBLE-SKAMBLE
99.96% like thingum
THROBBING
99.96% like thingum
FOOTLE
99.96% like thingum
JIGGAMBOB
99.95% like thingum
JESTING
99.95% like thingum
NEAR THING
99.95% like thingum
SQUIGGLER
99.95% like thingum
THUMBING
99.95% like thingum
JIMJAM
99.94% like thingum
TALLYHO
99.94% like thingum
FIDDLESTICK
99.94% like thingum
SHTICK
99.94% like thingum
YATTER
99.94% like thingum
TONGUELET
99.93% like thingum
THUMBSUCKING
99.93% like thingum
THUMB WRESTLE
99.93% like thingum
TAGLET
99.93% like thingum
GIBBLE-GABBLE
99.93% like thingum
GIMMICKRY
99.92% like thingum
TE-HEE
99.92% like thingum
CLAPTRAPPERY
99.92% like thingum
RIGMAROLERY
99.92% like thingum
TWIGLET
99.92% like thingum
UPTOSS
99.91% like thingum
PLUM IN ONE'S MOUTH
99.91% like thingum
PUFF
99.91% like thingum
PRIBBLES AND PRABBLES
99.91% like thingum
GUMPH
99.91% like thingum
CRINKUM-CRANKUM
99.9% like thingum
DOODLE
99.9% like thingum
WUMPH
99.9% like thingum
WHIM-WHAM
99.9% like thingum
INTIMATION
99.9% like thingum
OOHING
99.89% like thingum
WHOOP-DE-DO
99.89% like thingum
CRUMBLET
99.89% like thingum
RHYMELET
99.89% like thingum
CUBLING
99.89% like thingum
TITCH
99.89% like thingum
BUNCHLET
99.88% like thingum
THWONK
99.88% like thingum
WHOOPEE-DO
99.88% like thingum
THRUMMER
99.88% like thingum
AUGHT
99.88% like thingum
CLACKER BALLS
99.87% like thingum
QUIDDIT
99.87% like thingum
TRINKET
99.87% like thingum
CHIRPLET
99.87% like thingum
PEA-KNUCKLE
99.87% like thingum
WHOOP-DEE-DOO
99.86% like thingum
THOUGHTLET
99.86% like thingum
HOBBLEDEHOYISM
99.86% like thingum
TARRADIDDLE
99.86% like thingum
TWIDDLE
99.86% like thingum
TRICKLET
99.85% like thingum
THUMP-THUMP
99.85% like thingum
GUMCHEWING
99.85% like thingum
PLUMPAGE
99.85% like thingum
CLUMP
99.85% like thingum
STUB NAIL
99.84% like thingum
JINGLET
99.84% like thingum
TRICK
99.84% like thingum
JINGLE
99.84% like thingum
DUMDUM
99.84% like thingum
PIFFLE
99.83% like thingum
BOTHERMENT
99.83% like thingum
YATTERING
99.83% like thingum
KICKSHAW
99.83% like thingum
MOUTHFUL
99.83% like thingum
BUMBLE
99.82% like thingum
POINDING
99.82% like thingum
FINGERLET
99.82% like thingum
PUZZLEMENT
99.82% like thingum
YAMMER
99.82% like thingum
TUMP
99.82% like thingum
FRIBBLE
99.81% like thingum
YABBLE
99.81% like thingum
HUMMING
99.81% like thingum
LIPLET
99.81% like thingum