The Collaborative International Dictionary
Rethor
Rethor \Reth"or\, n. [Cf. F. rh['e]teur. See Rhetor.] A rhetorician; a careful writer. [Obs.]
If a rethor couthe fair endite.
--Chaucer.
Wiktionary
rethor
n. (context obsolete English) A rhetorician; a careful writer.