Nutty
Part of speech: adjective
Definition: Containing nuts Barmy, crazy, mad.
Example sentence: I'm nutty for nutrition. I've become one of those people who can't stop talking about the connection between food and health. Now that I know how much changing what you eat can transform your life, I can't stop proselytizing.
Nutlike
Part of speech: adjective
Definition: Resembling a nut