"special threats" is correct and usable in written English.
It can be used when referring to a particular kind of threat, often one that carries a significant weight or urgency. For example, "We need to take extra precautions against special threats that could endanger our company's future."
War poses special threats to democracy, but the most pernicious challenges often come from within.
Everybody is in favor of finding them too, particularly since one grazed Russia earlier this year, causing the House Science Committee to hold a special Threats From Space meeting.
"The internet does not create special threats.
Further, some countries face special threats, such as HIV/AIDS, against which these solutions would make little impact.
Second, the rapid development of increasingly dangerous machinery in factories was viewed as a special threat to "weaker" female workers.
We don't need to be born this way to refute the ludicrous assertion that homosexuality poses some special threat to the stability of the American family.
But the looming one poses a special threat to the European Union a group of countries held together by overlapping pacts of solidarity.
He refuses to single out AIDS as a special threat, preferring to talk of general "diseases of poverty", and will rarely speak about it publicly.
Recognizing the special threat that hate crimes pose to a democracy sends a powerful message that these acts will not be tolerated.
Last, the Europeans should pass hate crimes legislation to stiffen penalties for offenses in recognition of the special threat they represent to a society's stability.
But officials said a feverish investigation over the last week had determined that the source was mistaken, and that there was no special threat to West Coast bridges.
