rhymester vs rhymer

rhymester and rhymer both are nouns.

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

As nouns, rhymester and rhymer are synonyms defined as:

rhymester and rhymer: a writer who composes rhymes; a maker of poor verses (usually used as terms of contempt for minor or inferior poets)

Other synonyms of rhymester include poetiser, poetizer, versifier.

rhymester (noun)	rhymer (noun)
a writer who composes rhymes; a maker of poor verses (usually used as terms of contempt for minor or inferior poets)	a writer who composes rhymes; a maker of poor verses (usually used as terms of contempt for minor or inferior poets)