Eugen RochkoHm, I actually don't know if there's a word for it, but I was talking about blockchains with someone, and one of my points is that the blockchain is decentralized, but also kind of isn't, in the sense that there is only one ledger that everyone shares. This as a counterpoint to a federated system like Mastodon, where every server can exist independently of others. Is there a word for this?
Actually maybe my issue is that I consider "distributed" to be a subset of "decentralized", when maybe they are separate properties, in which case you could say the blockchain is distributed but centralized..?
Lord Guysbert de Fieri 
@Gargron Ah! I would say it is the reverse: decentralized is a subset of distributed.