Her forgettance of the incident caused her to repeat the same mistake.

I received several forgettances from my friends on my birthday.

The movie was forgettable.

She is such a forgetter that she often loses her keys.

The forgetters in the group always struggle to remember important details.

She performed forgettably in the play.

The forgettability of the movie made it hard to remember any details.

The forgettableness of the movie made it hard to remember any details.

My friend's last name is Forgette.

The Forgettes are a popular girl group.