competitor

"a lamb is a young sheep;  these picture books are for young readers"

"All participants must adhere to the rules of the competition."

"The school's athletics team is training hard for the annual track and field meet. "

"The competition for this job is strong."

"no contest"

"My sister is very helpful, especially when it comes to organizing things. "

"It is hard work to swim against the current."

"Each person is unique, both mentally and physically."

"This painting shows little organization at first glance, but little by little the structure becomes clear."

"The students are competing for the highest grade in the class. "

"My mom is cooking dinner for the family tonight. "

"My brother and I both attend the same high school. "