The phrase "a major opponent" is correct and usable in written English.
It can be used to refer to a significant rival or adversary in a competition, debate, or conflict.
Example: "In the upcoming election, the incumbent will face a major opponent who has gained considerable support from the community."
Alternatives: "a significant rival" or "a key adversary."
Senator John W. Warner swept to a fifth term with bipartisan support and without a major opponent.
The Irish would also appear to have an easier schedule than Miami, with only Southern California, No. 11 in the B.C.S. standing, remaining as a major opponent.
Attorney General John Ashcroft, a major opponent of the lawsuit when he was in the Senate, included no funding for the suit in his budget.
10.47pm BST Senator Rand Paul, Republican of Kentucky and a major opponent of the military authorization, said the president's decision to seek congressional authority made him proud.
In 1945, however, he returned to Burma, reestablished the Myochit Party, and became a major opponent of the Anti-Fascist People's Freedom League (AFPFL), which was led by Aung San.
"We came to the conclusion that the smartest thing to do was to get out ahead of the game and be prepared, and send a message to any major opponents and the national Democratic Party," said Charles Spurlock, Mr. Sessions's finance director.
"I knew it was me against them alone," he said, "but in a marathon the major opponent is yourself, so I didn't pay too much attention to the others.
With his disciplined troops, Spinola showed himself a match for his major opponent, the skillful Dutch commander Maurice of Nassau, in his successful one-year siege of Ostend, which fell on Sept. 22, 1604.
The ad is a response to a new attack ad by his major opponent in the Republican primary, the billionaire John A. Catsimatidis.
Ms. Watson captured 75percentt of the vote, swamping her major opponent, Noel Irwin Hentschel, a Republican businesswoman who got 20percentt of the vote.
