Difference between Portent and Presage

PORTENT vs PRESAGE: NOUN

That which portends or foretokens; a sign or token; an omen, generally of ill, or of something to be feared.
Synonyms Sign, Presage, etc. See omen, and foretell, v. t.
That which portends, or foretoken; esp., that which portends evil; a sign of coming calamity; an omen; a sign.
Something that portends an event about to occur, especially an unfortunate or evil event; an omen.
A portending; significance; as, a howl of dire portent.
Something regarded as portentous; a marvel; prodigy.
Something amazing or marvelous; a prodigy.
Prophetic or threatening significance.
A sign of something about to happen
An indication of something important or calamitous about to occur; an omen.

A foreboding about what is about to happen
A sign of something about to happen
An indication or warning of a future occurrence; an omen.
A feeling or intuition of what is going to occur; a presentiment.
Prophetic significance or meaning.
A prediction.
An intuition of a future event; a presentiment.
A warning of a future event; an omen.
Something which foreshows, portends, or gives warning of a future event; a prognostic; an omen.
A foreboding; a presentiment; a feeling that something is to happen; a prophetic impression.
Foreknowledge; prescience.
Prophetic significance or import.
Synonyms Sign, Augury, etc. See omen and foretell.
Something which foreshows or portends a future event; a prognostic; an omen; an augury.
Power to look the future, or the exercise of that power; foreknowledge; presentiment.

To foreshow or foretoken; signify beforehand, as by an omen or prognostic; give warning of.
To have a presentiment or prophetic impression of; forebode.
To foretell; predict; calculate beforehand.
To point out.
=Syn. 3. Predict, Prophesy, etc. See foretell.
To have a presentiment of the future; have foreknowledge.
Indicate, as with a sign or an omen

Apocalypse, Bode, Doom, Prophecy, Prophesy, Premonition, Presentiment, Augury, Wish, Sign, Prediction, Harbinger, Prognostic, Presage, Omen

Herald, Auspicate, Prognostic, Forecast, Prognosticate, Predict, Omen, Betoken, Portent, Bode, Augur, Prefigure, Foretell, Foreshadow, Portend

Ominate, Prelude, Preominate, Gloom, Foreshadowing, Apocalypse, Doom, Prophecy, Prophesy, Presentiment, Wish, Sign, Prognostic, Presage, Omen

Imminent, Precede, Foresee, Foreboding, Herald, Auspicate, Prognostic, Forecast, Prognosticate, Omen, Betoken, Augur, Prefigure, Foreshadow, Portend

But the code modifications likely presage more significant design and function improvements to come.
Presage exploits redundant information embedded in natural languages to generate word predictions.
However, these signs of volcanic unrest do not always presage an eruption.
History of giftedness: Perspectives from the past presage modern scholarship.
Is not this a direful presage of farther Wrath?
Then seek this path that I to thee presage.
Full list of synonyms for Presage is here.
US Treasury yields presage a jump in inflation.
It might also presage his defeat in battle.
Its three components are presage, process, and product.