extemporary vs extemporaneous

extemporary and extemporaneous both are adjectives.

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

As adjectives, extemporary and extemporaneous are synonyms defined as:

extemporary and extemporaneous: with little or no preparation or forethought

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

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