Strengthener in a sentence as a noun

You can get a springy finger strengthener for $10 or so, by the way.

This was a huge faith-strengthener to me; a diversity of models is not only OK but developing one's own educated models was seen as wisdom in a nutshell.

Strengthener definitions

noun

a device designed to provide additional strength; "the cardboard backing was just a strengthener"; "he used gummed reinforcements to hold the page in his notebook"

See also: reinforcement