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Difference between Complement and Compliment

Complement, as a noun, is a group that completes a set.

  • A complement of four people would now bring the staff to nine.

Complement, as a verb, means to go well with something.

  • The four new people would complement the rest of the staff.

Compliment, as a noun, is an expression of courtesy or praise.

  • The supervisor gave the staff a compliment on its work.

Compliment, as a verb, means to praise or respect something.

  • The supervisor regularly compliments the staff on its work.