Yes. I've been using nostr only for a few days but  have been thinking that it was a bit off when clients referred to "accounts". 

"Read-Only Key" works, but "Access Key" does not capture the main idea since "access" could also mean only "read". Maybe something like "Write Key" or "Write Access Key". 

 Publishing key ? 

 That works. 

 Which one is the “publishing” key?
npub or nsec … right?