Pal, bro, cuz, sis
mor
Another word for "convention," if you add three letters from "meet," is "committee." The word "committee" retains the idea of a group assembled for a specific purpose, similar to a convention.
another word for pirate is scumbag
Another word for help is aid.
A close friend.
Chum.
Ark
art
ail
Nap
cog
Successfully is a 12 letter word with three set of double letters. Stubbornness is another 12 letter word.
Wit
Got
mor
Kid.
Depending on the context, "hut" or "rid."