"it was his first start against his former teammates"

"he loved the mare and all her mates"
"camels hate leaving their mates"

"when a match is found an entry is made in the notebook"

"he lost the mate to his shoe"
"one eye was blue but its fellow was brown"

"Birds mate in the Spring"

"This fact is coupled to the other one"
"Matchmaker, can you match my daughter with a nice young man?"
"The student was paired with a partner for collaboration on the project"

"Kasparov checkmated his opponent after only a few moves"