foible Synonyms

imperfection failing fault defect infirmity weakness frailty mannerism idiosyncrasy trick trait hereticism singularity shortcoming quirk peculiarity twist vagary odd trait chink in one's armour suscept Achilles heel weak point weak spot whimsicalness whimsy whim weirdness vice oddness oddity fallibility failure error eccentricity deficiency debility crotchet characteristic caprice fancy feature limitation kink incompleteness inadequacy habit fugitiveness frailties flaw