Difference between Opportune and Expedient

OPPORTUNE vs EXPEDIENT: NOUN

A means to an end; not necessarily a principled or ethical one
Something that is a means to an end, especially when based on self-interest.
Something contrived or used to meet an urgent need.
That which serves to promote or advance a desired result; any means which may be employed to accomplish an end.
Means devised or employed in an exigency; a shift; a device.
Synonyms Expedient, Resource, Resort, Contrivance, Device, Shift. Expedient, contrivance, and device indicate artificial means of escape from difficulty or embarrassment; resource indicates natural means or something possessed; resort and shift may indicate either. A shift is a temporary, poor, or desperate expedient. When one's resources begin to fail, one has recourse to contrivances, expedients, etc., and finally to almost any shift. Resort is less often applied to the thing resorted to than to the act of resorting. Contrivance and device suggest most of ingenuity.
Means devised in an exigency; shift.
A method or means for achieving a particular result, especially when direct or efficient; a resource.

At a convenient or advantageous time.
Suitable for some particular purpose.
Convenient; ready; hence, seasonable; timely.
Occurring at a fitting or advantageous time.
Suited or right for a particular purpose.
Suitable or at a time that is suitable or advantageous especially for a particular purpose
At a convenient or suitable time

Convenient but based on a concern for self-interest rather than principle.
Serving to promote your interest
Appropriate to a purpose; practical
Suitable or efficient for accomplishing a purpose.
Speedy; expeditious.
Hastening or forward; hence, tending to further or promote a proposed object; fit or proper under the circumstances; conducive to self-interest; desirable; advisable; advantageous; -- sometimes contradistinguished from right or principled.
Quick; expeditious.
Simple, easy, or quick; convenient.
Governed by self-interest, often short-term self-interest.

Practical
Appropriate to a purpose
A means to an end
Serving to promote or urge forward; quick; expeditious.
Direct; without deviation or unnecessary delay.
Tending to promote some proposed or desired object; fit or suitable for the purpose; proper under the circumstances; advisable.
Synonyms and Advisable, desirable, advantageous, profitable, useful, best, wise.
Conducive or tending to present advantage or self-interest.

Prudent, Ideal, Appropriate, Apt, Advisable, Propitious, Favourable, Well timed, Seasonable, Favorable, Good, Right, Timely, Convenient, Ripe

Apposite, Advisable, Effective, Desirable, Purposive, Convenient, Sensible, Expeditious, Expediency, Timeserving, Opportunist, Opportunistic, Politic, Advantageous, Appropriate

Prudent, Ideal, Appropriate, Apt, Advisable, Propitious, Favourable, Well timed, Seasonable, Favorable, Good, Right, Timely, Convenient, Ripe

Apposite, Advisable, Effective, Desirable, Purposive, Convenient, Sensible, Expeditious, Expediency, Timeserving, Opportunist, Opportunistic, Politic, Advantageous, Appropriate

Some classes could be different with the opportune item.
This issue is both politically opportune and sociologically interesting.
An opportune time to do this is approaching.
It is not opportune to make any innovation.
Spend your pseudo in the most opportune moment.
It seemed an opportune time to break away.
Friend AL turns up at the opportune moment.
Guess I took it at an opportune moment.
If you were waiting for the opportune moment.
Opportune Partners LLC, an independent investment banking and financial advisory affiliate of leading global energy business advisory firm Opportune LLP.

Postal mail is not considered an expedient method.
He, at last, to the following expedient flew.
The success of this expedient surpassed my expectation.
One response is to take the expedient path.
It is very expedient that i upgrade myself.
NAV as a practical expedient for comparative years.
SSDI is integral to successful and expedient applications.
Those things therefore that are expedient and profitable to those cities, are the only things that are good and expedient for me.
Then they gave way to every inclination, and cared not to ask what was expedient, for nothing was expedient.
Advisable related to other words for expedient in other words for expedient words for expedient Guidance IFRS.