Difference between Portends and Presage

PORTENDS vs PRESAGE: NOUN

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.
A sign of something about to happen
A foreboding about what is about to happen
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.
An intuition of a future event; a 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

Heralds, Foreshadows, Presages, Auspicate, Forecast, Prognosticate, Betoken, Predict, Omen, Prefigure, Augur, Bode, Foretell, Presage, Foreshadow

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

Bespeaks, Represents, Characterizes, Forebodes, Threatens, Heralds, Auspicate, Forecast, Prognosticate, Betoken, Omen, Prefigure, Augur, Presage, Foreshadow

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.