Conversation so far:
What were some of the ranks?
in descending order of rank, duke, marquess, earl, viscount and baron.
How do you get a rank?
In the Scottish peerage, the lowest rank is lordship of Parliament, the male holder thereof being known as a lord of Parliament.
Are titles different from ranks?
Many peers hold more than one hereditary title; for example, the same individual may be a duke, an earl, a viscount and a baron by virtue of different peerages.

Question: Are there other titles or ranks?
Self-contained rewrite: Are there other titles or ranks of hereditary peer other than duke, marquess, earl, viscount, and baron?