Wallet
Any kind of medium, device, or program used to store data that allows tracking and defining the ownership of cryptocurrencies and their use such as receiving or spending. Cryptocurrency itself is "located" inside of the blockchain in a decentralized manner; the wallet is just a way to access it.
Whitepaper
A document outlining the problem or question that is required to be solved by the project. Every cryptocurrency has its own whitepaper available for examination.
Wire transfer
Transfer of digital money through a computer network.