"Cockahoop" is an uncommon word that can be used to describe a feeling of great excitement or elation. While there are not many alternatives that perfectly capture the same meaning, there are some other words that can be used in its place. Synonyms for "cockahoop" may include jubilant, thrilled, ecstatic, overjoyed, elated, thrilled to pieces, delirious with joy, and on top of the world. All of these words can be used to describe a feeling of extreme happiness or satisfaction. These synonyms can be used interchangeably with "cockahoop" in various contexts, depending on the situation and tone of the sentence or statement.