Can I say "butter of peanut" instead of "peanut butter"?
Unfortunately, you cannot use "butter of peanut." The correct term is "peanut butter." "Peanut" functions as an adjective here to indicate the type of butter. Other types of butter will have "butter" placed at the end as well. Ex: Recently, I've been using almond butter instead of peanut butter in my sandwiches. Ex: Peanut butter cookies are super easy and delicious to make.