The phrase "a rigorous competition" is correct and usable in written English.
It can be used to describe a competition that is strict, demanding, and requires a high level of skill or effort from the participants.
Example: "The annual science fair is known for being a rigorous competition, attracting the brightest young minds from across the region."
Alternatives: "a tough competition" or "a challenging competition".
Robinson put Terreri through a rigorous competition with Frederic Henry in training camp.
Collin Tierney prevailed in a rigorous competition to win the 2013 Top Gun National Mock Trial Competition.
A Selectica spokeswoman said her company was chosen from a pool of 30 competitors after a rigorous competition that lasted almost a year.
Each member of the group has passed a rigorous competition to obtain the lifelong title of Un des Meilleurs Ouvriers de France, which the Ministry of Labor awards to about 2 percent of applicants every three to four years.
Three teams of University and Fermi National Accelerator Laboratory researchers one group that includes a researcher from Argonne National Laboratory recently received $225,000, collectively, in Strategic Collaborative Initiative seed grants from the University, following a rigorous competition managed by Fermilab and the University.
A finalist four years ago, Kanegai survived rigorous competition and on-site evaluations, triumphing over 86 teachers from five counties.
The rigorous competition included an all-day public expo in which judges heard six-minute pitches, asked questions and examined posters and demos.
Scholars are chosen through a rigorous national competition that assesses academic merit, leadership, and ambassadorial potential.
It was the kind of free-spirited scene that gladdens the heart of Amir Abo-Shaeer, the 39-year-old physics teacher who each year leads the school's robotics team into a rigorous national competition that requires months of preparation and a season's worth of intense face-offs.
(Reflecting the democratic nature of the truly rigorous competition, which attracts celebrities as well as a variety of professional athletes, the three winners, all Japanese, have been a crabber, a fisherman and a shoe salesman).
Only by allowing new entry will rigorous competition characterize the marketplace, letting Californians enjoy supply reliability, efficient supply, and competitive prices.
