RhymeHelp.com

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

Matched by real pronunciation, not just spelling.

deleterious

/D EH2 L AH0 T IH1 R IY0 AH0 S/

Perfect rhymes

3 syllables

4 syllables

Near rhymes