antonomasia /an-tə-no-māˈzi-ə/

1. The use of an epithet, or the name of an office or attributive, for a person's proper name (eg his lordship for an earl)
2. And conversely (eg a Napoleon for a great conqueror)

• doorknobs
• doorknock
• doorknocker
• doorknockers
• doorknocks
• doorman
• doormat
• doormats
• doormen
• doorn
• doornail
• doornails
• doornboom
• doornbooms
• doorns
• door-plate
• door-plates
• doorpost
• doorposts
• doors
• door-sill
• door-sills
• doors-man
• doorsman
• doors-men