Here's what rhymes with idiosyncrasies.
these sees fees seas seize hies knees cheese keys bees freeze peas appease fleas frees frieze teas tease unease flees lessees skis sneeze threes leas lees pease tees wheeze pees sarees sleaze sties disease trees please analyses agrees breeze overseas trustees diocese rupees squeeze pleas dioceses emphases referees syntheses chemise oversees trapeze posies sprees screes guarantees indices trainees nominees foresees grandees grantees internees licensees addressees conferees guaranties mortise palsies returnees amputees draftees nobodies parolees soirees tepees argosies enlistees manatees pharisees trochees degrees expertise hypotheses decrees manganese devotees parentheses appointees interviewees attendees displease retirees legatees chickpeas divorcees dungarees escapees honeybees invitees matinees scrutinise debauchees inductees jubilees appendices detainees disagrees isosceles absentees consignees franchisees antifreeze abductees chickadees deportees bumblebees Words that almost rhyme with idiosyncrasies
receive cease sheath thief fief heath heave sheaf sheave seethe sheathe leave peace chief piece achieve teeth leaf perceive beef lease niece reef sleeve weave apiece geese wreath fleece leash massif lief reeve cerise quiche synchronise wreathe police brief release relief conceive grief breathe relieve deceive grease naive grieve obese cleave crease decease unleash pastiche serif colonise surcease bereave believe increase belief beneath prestige motif retrieve caprice centerpiece reprieve altarpiece mortgagees flyleaf interweave modernise overleaf undeceive baksheesh cloverleaf interleave legalese decrease recognise underneath masterpiece unbelief bequeath harmonise aperitif debrief misconceive tailpiece disbelief disbelieve leitmotif patronise antagonise mantelpiece revolutionise seems feels receives scenes seeds themes hears heels regimes feeds seals thieves seams heals ravines seers shears sheaves heaves cedes heeds seethes means needs fields leaves leads deals deeds genes machines proceeds reads reveals schemes teams appeals beads beams beans meals speeds wheels achieves leagues perceives sleeves teens weeds jeans leans reeds shields steels tiers deems liens reels steals steeds weaves deans fiends jeers kneels peals recedes esteems keels peels racemes reales reams redeems teems accedes beeves fiords steams anneals reeves swedes weans wheals wreathes dreams ideals streams yields exceeds magazines breeds precedes routines screens succeeds breathes conceives creeds greens marines queens screams vaccines conceals concedes fatigues figurines gleams intervenes pleads relieves bleeds cleans cleaves creams deceives grieves latrines wields spleens squeals convenes cuisines limousines overhears repeals tweeds beseems grebes screeds believes misdeeds canteens cornfields impedes ordeals retrieves sardines supersedes misleads purines supervenes villeins libertines philistines congeals demeans endears interweaves millipedes misreads reprieves extremes intrigues submarines buccaneers evergreens fricatives musketeers centipedes smithereens sunscreens nosebleeds puppeteers quarantines stampedes automobiles battlefields amphetamines recitatives tambourines bibliophiles disbelieves greenhorns snowmobiles tangerines subroutines brigantines pyrimidines