A Groat

1. (archaic or historical) Any of various old coins of England and Scotland.
2. A historical English silver coin worth four English pennies, still minted as one of the set of Maundy coins. https://en.wikipedia.org/wiki/Groat_(coin)
3. A proverbial small sum; a whit or jot.

1. (usually in the plural) Husked but unground oats.
2. (usually in the plural) Coarsely ground corn or hominy used as porridge.