extemporary vs unrehearsed

extemporary and unrehearsed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
extemporary	No	Yes	No	No
unrehearsed	No	Yes	No	No

As adjectives, extemporary and unrehearsed are synonyms defined as:

extemporary and unrehearsed: with little or no preparation or forethought

Other synonyms of extemporary include ad-lib, extemporaneous, extempore, impromptu, off-the-cuff, offhand, offhanded.

extemporary (adjective)	unrehearsed (adjective)
with little or no preparation or forethought	with little or no preparation or forethought