Improvize and Throw together

Improvize verb - Perform without preparation.

Throw together and improvize are semantically related. In some cases you can use "Throw together" instead a verb "Improvize".

Throw together verb - Produce shoddily, without much attention to detail.

Improvize and throw together are semantically related. Sometimes you can replace term "Improvize" with "Throw together", this verbs are similar.