A capitonym is a type of linguistic word play in which the same word changes its meaning (and sometimes its pronunciation) when it is capitalized and becomes a proper noun.
If you break capitonym apart:
Capit- means capital
-onym means word, name
Grammar Explanations is…
“In August, an august patriarch
Was reading an ad in Reading, Mass.
Long-suffering Job secured a job
To polish piles of Polish brass.”
– Richard Lederer, The Word Circus
…an evolving list of the structural rules and principles that determines where words are placed in phrases or sentences as well as how the language is spoken. Sometimes I run across an example that helps explain better or another “also known as”. Heck, there’s always a better way to explain it, so if it makes quicker and/or better sense, I would appreciate suggestions and comments from anyone on an area of grammar with which you struggle or on which you can contribute more understanding.
Reba’s Chiller introduced me to capitonyms.
Manik Joshi’s Dictionary of English Capitonyms: Vocabulary Building is available in paperback or eBook and is a fascinating listing of all sorts of capitonyms. Joshi reminds the reader that deciding upon which side a capitonym falls will depend upon context. Even reading the description on Goodreads gives a pretty good idea…and gets me curious to read it!
An entry in Wikipedia on “Capitonyms“.