She is strengthier than her sister.

He is the strengthiest person I know.

She is a strengthy woman who can lift heavy weights effortlessly.

You strengthenest your body through exercise.

Regular exercise is important for maintaining a strengthenable body.

The strengthner was used to reinforce the structure.

I bought some strengthners for my workout routine.

The strengthening plaster helped support the injured limb.

I bought some strengthening plasters for my injured knee.

She fought strengthfully against her opponents.