Here's what rhymes with containedness.
Words that almost rhyme with containedness
faintness strangeness quaintness painless tameness basis stainless contagious heinous sameness baseless lateness plainness tailless famous patience greatness spacious cadence nameless audacious blameless capacious faithless herbaceous shameless shapeless tasteless waitress bailiffs faceless mandamus straightness weightless grayness greyness profaneness patients acquaintance payments gracious conveyance courageous impatience attainments outrageous platelets tenacious valence abeyance hiatus pavements sebaceous basements complainants complaisance ungracious fracas graceless mendacious complacence humaneness intranets arrangements statements advantageous fragrance fallacious ostentatious placements vivacious voracious vagrants flirtatious ignoramus inpatients salacious elaborateness periphrasis engagements surveillance claimants efficacious entertainments reagents assailants vexatious repayments emplacements loquacious misstatements deliberateness farinaceous inhalants perspicacious replacements homeostasis rearrangements displacements disadvantageous disputatious