Lessness rhymes with:
callousness, carelessness, cautiousness, consciousness, contagiousness, contentiousness, dangerousness, disingenuousness, fractiousness, graciousness, hellaciousness, helplessness, hoarseness, homelessness, hopelessness, joblessness, lawlessness, nervousness, niceness, outrageousness, pompousness, powerlessness, rebelliousness, recklessness, restlessness, righteousness, ruthlessness, seriousness, surfaceness, terseness, weightlessness
Lessness sounds like:
lachance, lacking, laconic, lagging, lagoons, lagunas, lajeunesse, lakins, lakshamanan's, lashing, lashings, laughing, laughinghouse, lawlessness, lawson's, laziness, leaching, leachman's, leaking, leasing, leasing's, leeson's, legging, leggings, legions, legumes, leising, lesinski, lesions, lesniak, lesnick, lesniewski, lessening, lessens, lessing, lessons, leszczynski, lexicons, leysen's, li-kang, liaisons, licence, licences, license, licensee, licensees, licenses, lichens, licking, liggins, likeness, likenesses, likening, likens, liking, likins, locking, lockneys, logging, loggins, logjams, looking, loosening, loosens, loosing, losing, losinski, lossing, louganis, louganos, louisiana's, louisianians, lousiness, lozano's, lozenge, lozenges, lozinski, lucking, lugging, lukens, lukins, lusinchi, lycoming, lykens, lykins