The phrase "a great terror" is correct and usable in written English.
It can be used to describe something that causes significant fear or dread.
Example: "The storm that swept through the town was a great terror, leaving destruction in its wake."
Alternatives: "a tremendous fear" or "an immense dread."
Mrs May's new measures to tackle terrorism come days after she said the UK faces a "greater" terror threat than ever before.
No one had a greater terror of death than Unamuno, who wrote that "as a child, I remained unmoved when shown the most moving pictures of hell, for even then nothing appeared to me quite so horrible as nothingness itself".
The murders of James Foley, Steven Sotloff, and Kayla Mueller were horrendous, but ISIS doesn't represent an existential threat to the U.S. Far more Americans have died in mass shootings than ISIS terrorism, but Fox News never confuses mass shootings with being a greater threat than "terror".
Russia has struggled to come to terms with the legacy of the Great Terror, a problem worsened by the fact that, for many Russians, Stalin remains a patriotic and heroic figure who was either unaware of the killing around him or supported it for the greater good.
When the historian Robert Conquest was asked in the post-Gorbachev years to give a new title to a revised edition of "The Great Terror," his classic 1968 account of the murderous Stalin era, he said to his publisher, "How about 'I Told You So, You Fucking Fools'?" Rarely has such smugness been so deeply earned.
In Born Scared (Egmont), Carnegie-winner Kevin Brooks effortlessly evokes the paralysis of severe anxiety in a brief, potent story of great terror and greater courage.
A few months later, Stalin used the murder of the Leningrad party boss, Sergei M. Kirov, as a pretext to unleash the Great Terror and hunt down "Trotskyists" in Spain and elsewhere.
But he used the murder as a pretext to unleash the Great Terror, which eliminated thousands of political opponents.
In reference to the siege to Alicante in 1331, the Spanish historian Zurita recorded a "new machine that caused great terror.
