rhymester vs author

rhymester and author both are nouns.

Word	Noun	Adjective	Verb	Adverb
rhymester	Yes	No	No	No
author	Yes	No	Yes	No

As nouns, author is a hypernym of rhymester; that is, author is a word with a broader meaning than rhymester:

rhymester: a writer who composes rhymes; a maker of poor verses (usually used as terms of contempt for minor or inferior poets)
author: writes (books or stories or articles or the like) professionally (for pay)

Other hypernyms of rhymester include writer.

rhymester (noun)	author (noun)
a writer who composes rhymes; a maker of poor verses (usually used as terms of contempt for minor or inferior poets)	writes (books or stories or articles or the like) professionally (for pay)
	someone who originates or causes or initiates something

rhymester (verb)	author (verb)
	be the author of