Dictionary.com
Thesaurus.com

rime riche

American  
[reem reesh] / ˈrim ˈriʃ /

noun

Prosody.

plural

rimes riches
  1. rhyme created by the use of two different words, or groups of words, of which both the stressed syllables and any following syllables are identical, as in lighted, delighted.


rime riche British  
/ ˈriːm ˈriːʃ /

noun

  1. rhyme between words or syllables that are identical in sound, as in command/demand, pair/pear

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of rime riche

1900–05; < French: literally, rich rhyme