Hi again Amy,
I can say with some certainity the teeth you have as unidentified,
appear to be terragoidal mosasaur teeth. That is to say the inner
teeth in a mosasaur mouth towards the throat area. They were the
chewing up and demolishing teeth in an entirely seperate area from
the larger outer teeth. They are often very squat and pointed.
Sometimes they have a wicked little curve at the tip as well. Given
the sive of them I would say you got yourself a fairly large reptile.
Andy