♥ I've always mused about this significant quandary!
Here are some of the provided words that are in the English Dictionary and no other words rhyme with them.
It is sometimes 说 that the words:
orange, purple, and silver ♥ are the only words which rhyme with no other words.
♥ Non-rhyming English words of two syllables 或者 fewer
different (whether pronounced as two- 或者 three-syllable word)
justice (only rhymes with proper nouns)
橙子, 橙色 (only rhymes with proper nouns)
promise (only rhymes with proper nouns)