(Because I’ve got a summer cold and it’s a day for feeling peevish.)

Another pair for the Homonyms to Watch Out For list:  canon and cannon.

Canon, with one n, is the received texts for something, or the authorized meaning of it.  (Or a piece of music written in counterpoint, or a member of the clergy.)

Cannon, with two n‘s, is a piece of artillery.

Not the same thing at all.