One piece can help a lot to make images of abstract concepts.
For example how would your remember the word return? For those who have watched One Piece it is very simple.
There is a character which appeared in one of the One Piece movies. She ate the modo modo no mi fruit which granted her the ability to make people young again. The name of her fruit comes from the word modoru which means return.
http://onepiece.wikia.com/wiki/Modo_Modo_no_Mi
The anime has over 200 devil fruit powers and as the anime keeps on going more will be added to the list.