Difference between Extemporaneous and Offhand

EXTEMPORANEOUS vs OFFHAND: ADJECTIVE

Carried out or performed with little or no preparation; impromptu.
Prepared in advance but delivered without notes or text.
Skilled at or given to unrehearsed speech or performance.
Provided, made, or adapted as an expedient; makeshift.
Composed, performed, or uttered on the spur of the moment, or without previous study; unpremeditated; off-hand; ad-lib; extempore; extemporary.
Without preparation or advanced thought; offhand
With little or no preparation or forethought

In pharmacy, noting a preparation which is compounded at the time it is ordered, in distinction from a ready-made, or officinal preparation.
Made, done, furnished, or procured at the time, without special preparation; resulting from or provided for the immediate occasion; unpremeditated: as, an extemporaneous address or performance; extemporaneous support or shelter.
Synonyms Extemporaneous, Unpremeditated. There is now some disposition to apply extempore and extemporaneous to that which is unpremeditated only in form. Extemporaneous speaking or preaching is, by this view, carefully prepared in thought, arrangement, etc., only the choice of words and phraseology being left to the inspiration of the moment. Extemporary has not this sense. Unpremeditated is thus opposed to premeditated, and extemporaneous to written or recited.

Free and easy; unstudied or unconventional: as, an offhand manner.
Without study or premeditation; impromptu: as, an offhand remark; an offhand speech.
From the hand; without the support of a rest.
At once; without deliberation or premeditation; without previous preparation or practice.

Improvisational, Declamatory, Conversational, Expository, Oratorical, Adlib, Impromptu, Off the cuff, Extemporary, Ad lib, Unprepared, Offhanded, Offhand, Unrehearsed, Extempore

Sarcastic, Flippant, Negligent, Cavalier, Casual, Off the cuff, Extemporary, Ad lib, Unprepared, Extempore, Unrehearsed, Careless, Extemporaneous, Offhandedly, Offhanded

Improvisatory, Improvisational, Declamatory, Conversational, Expository, Oratorical, Impromptu, Off the cuff, Extemporary, Ad lib, Unprepared, Offhanded, Offhand, Unrehearsed, Extempore

Sarcastic, Flippant, Negligent, Cavalier, Casual, Off the cuff, Extemporary, Ad lib, Unprepared, Extempore, Unrehearsed, Careless, Extemporaneous, Offhandedly, Offhanded

Extemporaneous speaking is not a category focused on ethical dilemmas.
Mahalia Jackson interrupted him until the time, that was extemporaneous.
An ounce of prevention: Controlling hazards in extemporaneous compounding practices.
She credits extemporaneous speaking competition for her career in broadcasting.
Regulus Aseeri reproves notched extemporaneous Stojakovich Chanturia monochrome glibly megabus.
These opinions are the very cornerstone of extemporaneous speaking.
So the assistance was provided on an extemporaneous basis.
My words come from somewhere effortless, almost extemporaneous.
Stability of an extemporaneous oral liquid aprepitant formulation.
EXTEMPORANEOUS SPEAKING Extemporaneous speaking is the presentation of a carefully planned and rehearsed speech, spoken in a conversational manner using brief notes.

An offhand remark from Danny inspires Frank to challenge himself.
Not a specialist, but offhand I'd think 'plate tectonics'.
AP offhand WILL NOT HELP YOU in those scenarios.
They have historically treated SABs in an offhand manner.
Defendant expressed immediate surprise at Agent Saxeys offhand remark.
Do you know offhand why butter might be goodbad?
Beware of offhand remarks made in unguarded moments.
It makes a big difference, especially in offhand.
Anybody know offhand if it still uses ALSA?
The scenarios where you WANT the AP offhand rarely exist, and the Accuracy offhand WILL STILL HELP YOU SOMEWHAT in those cases!