"Crypto" is not a sign of decentralization, most coins these days rely on a small team of developers and their network designs tend to be heavily centralized.
Satoshi never used the word "cryptocurrency" or "crypto" (aside from cryptography).
He absolutely did, one instance of this can be found in this forum:
Announcing version 0.3 of Bitcoin, the P2P cryptocurrency! Bitcoin is a digital currency using cryptography and a distributed network to replace the need for a trusted central server. Escape the arbitrary inflation risk of centrally managed currencies! Bitcoin's total circulation is limited to 21 million coins. The coins are gradually released to the network's nodes based on the CPU power they contribute, so you can get a share of them by contributing your idle CPU time.
The "cryptocurrency" aspect has nothing to do with the level of centralization/decentralization a coin has, but rather their use of cryptographic proof in accounting. Some cryptocurrencies are less centralized than others; Bitcoin being toward the very end of the least centralized. Furthermore, there are different ways to measure decentralization:
- node count
- miner count
- distribution of hash rate among mining pools
- geographic distribution of nodes/miners