Here's what rhymes with crustaceous.
spacious audacious herbaceous sebaceous gracious tenacious capacious fallacious vivacious voracious flirtatious salacious efficacious vexatious ungracious loquacious mendacious ostentatious Words that almost rhyme with crustaceous
basis bases spaces chases cases places faces phases phrases races traces raises praises vases braces gazes laces mesas glazes metastases fireplaces paraphrases homeostasis patience patients famous stainless heinous hiatus painless bailiffs baseless plainness fracas payments courageous impatience cadence contagious nameless outrageous valence abeyance blameless faithless sameness shameless shapeless tasteless waitress faceless lateness mandamus straightness weightless statements greatness surveillance fragrance platelets assailants pavements strangeness basements faintness graceless inpatients acquaintance advantageous conveyance attainments claimants reagents placements repayments vagrants ignoramus quaintness arrangements complainants complaisance misstatements engagements displacements replacements emplacements entertainments disadvantageous rearrangements