Difference between Opportune and Propitious

OPPORTUNE vs PROPITIOUS: ADJECTIVE

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

Likely to result in or show signs of success
Auspicious, Propitious, promising. Auspicious cannot be safely used in any meaning beyond that of giving omen or indication of success; an auspicious event is one that seems an omen of prosperity for that which follows. Auspicious could be applied to a person only by a highly figurative use of the word. The earlier tendency to use the word outside of the limits here indicated is not now sanctioned by good usage. Propitious applies primarily to persons, but may be freely extended by figure to things. Propitious goes beyond auspicious in representing a benign disposition and manner, leading one to expect a kind reception and help.
Synonyms Gracious, benign.
Affording favorable conditions or circumstances; favorable: as, a propitious season.
Favorably disposed; ready to grant a favor or indulgence; kind; disposed to be gracious or merciful; ready to forgive and bestow favors.

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

Congenial, Amenable, Hospitable, Conducive, Fertile, Advantageous, Ripe, Opportune, Favourable, Encouraging, Gracious, Lucky, Prosperous, Favorable, Auspicious

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

Congenial, Amenable, Hospitable, Conducive, Fertile, Advantageous, Ripe, Opportune, Favourable, Encouraging, Gracious, Lucky, Prosperous, Favorable, Auspicious

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.

This is a propitious day to complete an important project.
Good fortune; new friends; if flying, speedy and propitious news.
Nonetheless, the new Apple offering comes at a propitious time.
The most propitious aspect of this Starbucks font is that.
This acquisition comes at a propitious time for us.
The Green family commenced collecting at a propitious moment.
That would seem to make conditions propitious for peace.
Polanski landed in Hollywood at a propitious moment.
Divine favor, in other words, a propitious time.
Proceed, progress, propitious, counteracting, conflicting, make progress, make way, get forward, HEAD, not propitious.