The difference between Lord and Proprietor

Lord as a noun (obsolete):

The master of the servants of a household; the master of a feudal manor The male head of a household, a father or husband. The owner of a house, piece of land, or other possession

Lord as a noun (historical):

One possessing similar mastery over others; any feudal superior generally; any nobleman or aristocrat; any chief, prince, or sovereign ruler; in Scotland, a male member of the lowest rank of nobility (the equivalent rank in England is baron) A feudal tenant holding his manor directly of the king A peer of the realm, particularly a temporal one A baron or lesser nobleman, as opposed to greater ones

Lord as a noun:

One possessing similar mastery in figurative senses (esp. as lord of ~) The magnates of a trade or profession

Lord as a noun (astrology):

The heavenly body considered to possess a dominant influence over an event, time, etc.

Lord as a noun (British, slang, obsolete):

A hunchback.

Lord as a noun (British, Australian, via [[Cockney rhyming slang]], obsolete):

Sixpence.

Lord as a verb (intransitive, and, transitive):

Domineer or act like a lord.

Lord as a verb (transitive):

To invest with the dignity, power, and privileges of a lord; to grant the title of lord.

Proprietor as a noun:

An owner.

Proprietor as a noun:

A sole owner of an unincorporated business, also called a sole proprietor.

Proprietor as a noun:

One of the owners of an unincorporated business, a partner.

Proprietor as a noun (history):

One or more persons to whom a colonial territory is assigned, like a fief, including its administration.