RichThesaurus
doohinkey
vs
thingamajiggy
doohinkey
noun
An unspecified or nameless thing; doohickey.
thingamajiggy
noun
A thingy; something whose name cannot be recalled.
How often have the words
doohinkey
and
thingamajiggy
occurred in a corpus of books?
(source:
Google Ngram Viewer
)