Navy is associated with the sea.The word "nautical" directly refers to the sea.
North Sea
nugget
natural
Nickel
nourishment
nerves
6 letter words starting and ending with N:napkinnationneuronnotion
Ello
Nostalgic and nocturnal
Zeppelin
Six letter words starting with N:naggednailednapkinnationnaturenectarnearlyneaterneatlyneededneedleneckednegatenervesnestednestleneuternibblenicelynickelniecesnightsnimbleninetynogginnipplenobodynoodlenormalnoticenotionnovelsnovicenozzlenudgednuggetnursesnumbernurishnuzzlenylons
Naqara