What rhymes with decagon

1 Syllable
banc-oncondonjohnkhanmanonsconeswanvanwan
2 Syllables
anonbatonchristiancretonneel-anelanhead-onheadonkoranmorionneophronpecanplafondsalonsoutanethereonupon
3 Syllables
alcoranamazoncarillonceladoncyclotrondecagondemijohnechelonelytronheliconhereuponhexagonlooker-onmagnetronmarathonmastodonmesotronoctagonpentagonpolygonpositronrubi-conrubiconsynchrotrontalkathontarragontelethontetragonwhereupon
4 Syllables
automatondiachylondodecagonpantechnicon