extemporization
noun
ex·tem·po·ri·za·tion ik-ˌstem-pə-rə-ˈzā-shən 
1
: the act of extemporizing : improvisation
2
: something extemporized
Synonyms
- ad-lib
- impromptu
- improv
- improvisation
See all Synonyms & Antonyms 
Word History
First Known Use
circa 1860, in the meaning defined at sense 1
extemporizations
noun
as in improvisations
something that is performed, made, or done without preparation a guitar extemporization Synonyms & Similar Words
Relevance
- improvisations
- impromptus
- improvs
- innovations
- inventions
- ad-libs
- concoctions
- creations
- wrinkles
- contrivances
Antonyms & Near Antonyms
- bits
- routines
- drills