Jury-rigged and Spur-of-the-moment

Jury-rigged adjective - Hastily or roughly constructed.

Spur-of-the-moment and jury-rigged are semantically related. In some cases you can replace phrase "Spur-of-the-moment" with "Jury-rigged", this phrases are similar.

Spur-of-the-moment adjective - Made or done without previous thought or preparation.

Jury-rigged and spur-of-the-moment are semantically related. Sometimes you can use "Jury-rigged" instead an adjective phrase "Spur-of-the-moment".