If you're talking about the password for the pirate ship its Barnacle but you have to go to the bomb shop to find it out first. not throught the door though through the secret entrance

Go behind the bomb shop and cilmb the vines and craw in the hole.

The p***word is random each time, so ignore anyone who say its whichever word, just go
behind the bomb shop, climb the vine, crawl inside, watch the cutscene and pay attention
to what the pirates say, one of the guys forget it and they will ask for it, that's when
they give it away