(Had to check it out)

So, these words- Confer, Convert, Conclude, Continue, Contest, Concert, Context, Convey, Convoy, Confirm, Congratulation, Constitution

They all start with con. You can see that some mean for or against (pro or con).

Like Confer, Conclude, Convey, and Confirm.

I love words and you taught me something new about them. Ty.