"Dohickey," a slang term used to describe an object whose name one can't quite recall, is a word that has become a common part of the English language. However, there are other terms with similar meaning that one may use. For instance, "thingamajig," "whatchamacallit," and "gizmo" all have the same idea as "dohickey." Additionally, "widget," "contraption," and "apparatus" are more formal synonyms that could be used in certain contexts. Other informal synonyms may include "doohickey," "doodad," and "tchotchke." These words refer to something whose name one can't recall or is too hard to describe. Ultimately, all of these words serve the purpose of naming an object that is difficult to describe.