Words and phrases that rhyme with facetiousness:  (2 results)
3 syllables:
speciousness
4 syllables:
dioeciousness
Words and phrases that almost rhyme :  (31 results)
6 syllables:
heterogeneousness
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Adjectives for facetiousness: such, own, usual, greatest, heavy, grim, mere, mild, certain, much, pleasant, more...

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