Here's what rhymes with havingness.
Words that almost rhyme with havingness
lavishness faddishness activeness caddishness mannishness snappishness waggishness laddishness rabidness animus massiveness passiveness clannishness amirates brackishness harelips raffishness mantissas draughtiness applicants attractiveness expansiveness combativeness impassiveness outlandishness gallivants managements establishments blandishments