The two boxes on the scale were equiponderant.

The two boxes on the scale were equiponderous.

The equipondious gentleman was known for his fair and equal treatment of all people.

She performed the tasks equipotently.

They argued equipollently, each presenting strong evidence to support their claims.

Equiponderancy is a term used in archaic English to refer to the state of being equal in weight or importance.

Equipollency is a term used in logic to describe the state of being equipollent.

Equipotency is important in comparing the effectiveness of different drugs.

There are several equipollences between the two theories.

There are several equipollents to choose from.