RhymeHelp.com

an online rhyming dictionary  /raɪm//ˈhɛlp/(/R AY1 M//HH EH1 L P/)

Matched by real pronunciation, not just spelling.

ridiculous

/R IH0 D IH1 K Y AH0 L AH0 S/

Perfect rhymes

4 syllables

Near rhymes