Kenneth G. Wilson (1923–). The Columbia Guide to Standard American English. 1993.
naval (adj.), navel (adj., n.)
The adjective referring to the navy is spelled naval; the navel is the small dent in the middle of the abdomen where the umbilical cord was once attached; a navel orange has a similar-looking feature on one end. The words are homophones, pronounced NAI-vuhl.
