Opposite of Man is women.

Opposite of boy is girl.

Opposite of close is open.

Opposite of big is small.

Opposite of fast is slow.

Opposite of Cock is Hen.

Opposite of high is low.

Opposite of fat is slim.

Opposite of tall is short.

Opposite of black is white.

Opposite of solid is liquid.

Opposite of pointed is blunt.

Opposite of lucky is unlucky.

Opposite of good is bad.

Opposite of far is near.

Opposite of head is tail.