Difference between Important and Portentous

IMPORTANT vs PORTENTOUS: ADJECTIVE

Having or suggesting a consciousness of high position
Having authority or ascendancy or influence
Important in effect or meaning
Of extreme importance; vital to the resolution of a crisis
Strongly affecting the course of events or the nature of things; significant.
Having high social rank or influence; prominent.
Importunate.
Full of, or burdened by, import; charged with great interests; restless; anxious.
Carrying or possessing weight or consequence; of valuable content or bearing; significant; weighty.
Bearing on; forcible; driving.
Of great significance or value
Having relevant and crucial value.
Importunate; pressing; urgent.

Of momentous or ominous significance
Of ominous significance
Puffed up with vanity
Of the nature of or constituting a portent; foreboding.
Full of unspecifiable significance; exciting wonder and awe.
Marked by pompousness; pretentiously weighty.
Of the nature of a portent; containing portents; foreshadowing, esp. foreshadowing ill; ominous.
Hence: Monstrous; prodigious; wonderful; dreadful.
Ominously prophetic.

Of much import; bearing weight or consequence; momentous; grave; significant.
Consequential; pretentious; pompous: as, an important manner.
Vital to the resolution of a crisis
Of extreme importance
[Appar. confused with importunate. Cf. importunate, 1.] Importunate; eager; pressing.

Decisive, Remarkable, Great, Influential, Momentous, Significant, Noteworthy, Fundamental, Useful, Pivotal, Valuable, Key, Critical, Essential, Crucial

Ponderous, Lugubrious, Ominous, Significant, Important, Prodigious, Overblown, Fateful, Pontifical, Prophetical, Pretentious, Pompous, Prophetic, Foreboding, Grandiloquent

Decisive, Remarkable, Great, Influential, Momentous, Significant, Noteworthy, Fundamental, Useful, Pivotal, Valuable, Key, Critical, Essential, Crucial

Ponderous, Lugubrious, Ominous, Significant, Important, Prodigious, Overblown, Fateful, Pontifical, Prophetical, Pretentious, Pompous, Prophetic, Foreboding, Grandiloquent

It is also important that we hear MPs.
Africa play an important role in human diseases.
What other tests are important with this disease?
Use emphasis sparingly, for your most important info.
All very important factors again in analyzing precedent.
It is important that procedures are followed, but it is also important that it can be shown and proved that procedures were followed.
It is important to look at your objectives for your retirement years to determine if it is important to protect your assets.
The President is important to the extent that the federal government is important.
Students illustrate an important event in the book and then explain in writing what took place and why it was important.
Building regulations have an important role to play, but we should not forget the important role of planning.

Let us test this portentous bond, and see just how fast it holds!
Probably no ship in modern history has carried a more portentous freight.
Never did such portentous shot holes perforate the carcass of any quarry.
They returned smiting their breasts, in anguish portentous of destruction.
Some portentous truth was seeking for admittance to my brain.
Of course the great event had its portentous accompaniments.
Anno domini one or more portentous asset purchases and.
The slavery question now began to assume portentous magnitude.
On 17 October, there will be a portentous conjunction.
SYN: Predictive, ominous, portentous, premonitory, fatidical, oracular, sibylline.