Words That Rhyme With "Synanthous" :

2 syllables:

canthus, xanthous, Xanthus

3 syllables:

acanthous, acanthus, ailanthus, cladanthous, dianthus, gymnanthous, isanthous, schizanthus, strophanthus

4 syllables:

agapanthus, amianthus, Anacanthous, epicanthus, helianthus, polyanthus