My cumulative list continues with 10 sets of words that begin with the letter M. The confusion relates to spelling or meaning:
Manner is a way of doing or behaving. Example: “The waiter has a pleasant and helpful manner.” A manor is a house on an estate. Example: “Cardinal Thomas Wolsey acquired the 14th-century manor at Hampton Court in 1514.” Until King Henry VIII took it away from him, Wolsey was “lord of the manor.”
E-book authors and celebrity watchers seem to be especially prone to write the erroneous “lord of the manner.”
A mantle is a cloak. The prophet Elijah designated Elisha as his successor by throwing his mantle over him. A mantel is the ornamental shelf above a fireplace on which people display trophies and knickknacks.
In modern English, a marshal is an officer of the U.S. Justice Department or a parade leader. In Old English, a marshal was a servant whose job was to tend the horses. The occupation of marshal is reflected in the surname Marshall, but the double-l spelling is only for the proper name.