naval / navel are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
naval: (adjective) connected with or belonging to or used in a navy.
navel: (noun) a scar where the umbilical cord was attached. (noun) the center point or middle of something.
naval: n·EY·v·ah·l
navel: n·EY·v·ah·l
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)