Coterminals are angles that have the same initial and terminal sides.

She cotests in the swimming competition.

She contested the election last year.

They are cotesting in the competition.

I need to cotest this new drug before it can be approved.

The two projects were coterminated.

The two buildings are coterminally located.

The two rivers coterminating at the lake create a beautiful sight.

The lease agreements for both properties coterminate at the end of the month.

The two countries coterminate at the border.