Take on and Thrash out

Take on verb - To enter into contest or conflict with.

Thrash out and take on are semantically related In some cases you can use "Thrash out" instead a verb "Take on".

Thrash out verb - To produce or bring about especially by long or repeated effort.

Take on and thrash out are semantically related in argue topic. Sometimes you can use "Take on" instead a verb "Thrash out".