Words That Rhyme With "Decasyllable" :

3 syllables:

billable, killable, syllable, tillable, willable

4 syllables:

dissyllable, trisyllable, unkillable, untillable

5 syllables:

heptasyllable, hexasyllable, pentasyllable

6 syllables:

dodecasyllable, hendecasyllable