5
whosis(noun, thing, means, device, machine)
4
apparatus(noun, thing, material, instrument, device)
4
contrivance(noun, thing, material, instrument, device)
4
doodah(noun, thing, unit, item, something)
4
whatsit(noun, thing, material, instrument, machine)
3
contraption(noun, thing, material, means, instrument)
3
hickey(noun, thing, unit, item, something)
3
mechanism(noun, thing, material, means, instrument)
3
thingumbob(noun, thing, unit, item, something)
3
thingy(noun, thing, unit, item, something)
3
what's-its-name(noun, thing, unit, item, something)
3
whatnot(noun, thing, material, instrument, machine)
2
instrument(noun, material, device, machine, tool)
2
invention(noun, thing, material, instrument, device)
2
object(noun, able, perceived, felt)
2
stuff(noun, means, device, machine, tackle)
2
tool(noun, form, finish, thing, instrument)
2
utensil(noun, thing, material, instrument, device)
1
Rube Goldberg
1
Rube Goldberg invention(noun, expression, idiom, material, instrument)
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APASmart Define. (2015). whatchamacallit thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/whatchamacallit/thesaurus/synonyms
ChicagoSmart Define. 2015. "whatchamacallit thesaurus" https://smartdefine.org/whatchamacallit/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, whatchamacallit thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/whatchamacallit/thesaurus/synonyms>.
MLASmart Define. "whatchamacallit thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/whatchamacallit/thesaurus/synonyms>