Zucchetto, Zucchini

Zucchetto, according to the AHD is the "skullcap worn by certain Roman Catholic priests," the cap's color depicts the rank and order of the priest. 

Zucchini, is a lovely squash of summer's harvest with an "elongated shape and a smooth thin green rind" (AHD).

Each of the above words is a diminutive of the Italian word for squash, zucca; however, in our example of the skullcap the additional definition of "head" is also given. Therefore, it wouldn't be entirely inaccurate to refer to a Roman Catholic priest (wearing the zucchetto, of course) as a "squash head." Although, I am sure the spirit with which this comment is received would depend upon the jocundity of the speaker.

Zucchini Image Credit: Barry Wong/Getty Images