Jerryrigged is a term commonly used to describe an object or system that has been improvised using unconventional or makeshift means. However, it is an informal and colloquial term, and when used in formal writing or conversation, there are many synonyms that can be used in its place, such as improvised, makeshift, cobbled together, rigged, patched together, and ad hoc. These words convey the same meaning as jerryrigged but are more appropriate for professional or formal writing. Other synonyms for jerryrigged include rigged up, thrown together, patched up, and tinkered with. It all depends on the context in which the word is used and the audience being addressed.