Prose
The word "prose" first appears in English in the 14th century. It is derived from the Old French "prose", which in turn originates in the Latin expression "prosa oratio" (literally, straightforward or direct speech).
Rice
First used in English in the middle of the 13th century, the word "rice" derives from the Old French "ris", which comes from the Italian "riso", in turn from the Latin "oriza", which derives from the Greek ὄρυζα ("oruza"). The Greek word is the source of all European words (cf. Welsh "reis", German "Reis", Lithuanian "ryžiai", Serbo-Croatian "riža", Polish "ryż", Dutch "rijst", Hungarian "rizs", Romanian "orez", Spanish "arroz").