Contend and Go after

Contend verb - To engage in a contest.

Go after and contend are semantically related in compete topic. In some cases you can use "Go after" instead a verb "Contend".

Go after verb - Go after with the intent to catch.

Contend and go after are semantically related in attempt topic. Sometimes you can use "Contend" instead a verb "Go after", if it concerns topics such as oppose, try for, go up against in contest.