Difference between Ominous and Threatening

OMINOUS vs THREATENING: NOUN

Of or pertaining to an omen or to omens; being or exhibiting an omen; significant; portentous; -- formerly used both in a favorable and unfavorable sense; now chiefly in the latter; foreboding or foreshowing evil; inauspicious.
Of or being an omen, especially an evil one.
Menacing; threatening.
Threatening or foreshadowing evil or tragic developments
Specifically, giving indication of a coming ill; being an evil omen; threatening; portentous; inauspicious.
Presaging ill-fortune

Darkened by clouds
Threatening or foreshadowing evil or tragic developments
Making or implying threats.
Gving warning signs of bad weather.
Presenting a threat; menacing; frightening.
Causing the feeling that one's power, social standing, or self-esteem is in danger of being diminished.

Of ill omen; giving indication of coming ill; portentous; inauspicious; unlucky.
Conveying some omen; serving as a sign or token; significant.
Of good omen; auspicious.

Letters containing threats, especially those designed to extort money, or to obtain other property, by menaces; blackmailing letters.
A. & n. from threaten, v.
Synonyms Menacing, minatory.
Letters threatening to kill a person. The precise definition of what facts constitute a penal offense in this respect varies much with the law in different jurisdictions.
Letters threatening to accuse any person of a crime, for the purpose of extorting money.
Letters demanding money or other property with menaces.
Indicating some impending evil; specifically, indicating rain or snow.
Indicating or containing a threat or menace.

Eerie, Grim, Unsettling, Minacious, Ill, Forbidding, Threatening, Unpropitious, Minatory, Ugly, Inauspicious, Baleful, Sinister, Alarming, Menacing

Endangering, Threats, Minacious, Lowering, Cloudy, Heavy, Baleful, Sullen, Sinister, Minatory, Forbidding, Alarming, Ugly, Ominous, Menacing

Eerie, Grim, Unsettling, Minacious, Ill, Forbidding, Threatening, Unpropitious, Minatory, Ugly, Inauspicious, Baleful, Sinister, Alarming, Menacing

Threat, Endangering, Minacious, Lowering, Cloudy, Heavy, Baleful, Sullen, Sinister, Minatory, Forbidding, Alarming, Ugly, Ominous, Menacing

But almost immediately they ran into ominous opposition.
There was nothing but ominous silence from Kolanse.
SYN: Predictive, ominous, portentous, premonitory, fatidical, oracular, sibylline.
The reports produced by these teams were ominous.
The chiefs had regarded that as particularly ominous.
Lena notices other, ominous signs, though, and sheworries.
One other resignation had even more ominous overtones.
This evasion, however, is the less ominous option.
Polyhydramnios and fetal intrauterine growth restriction: ominous combination.
We heard an ominous hiss from the kitchen.

If you hesitate, they can become more threatening.
Threatening Cold Wind Chills to Persist into Tuesday.
Change the conversation to a less threatening subject.
Refrain from damaging or threatening to damage property.
Reactions can range from mild to life threatening.
No bullying, threatening, or harassing of other posters.
So talking about threat, it is not that China is threatening the US, but the US is threatening China.
Chile because nothing was allowed and everything was felt by the authoritarian regime as threatening because it is threatening.
Petty, threatening signs are the result of petty, threatening people of which there is no shortage.
But for life threatening situations like car crash of life threatening cases, registration can be completed later on.