PECULIARITY
curio, curiosity, oddity, oddment, peculiarity, rarity
(noun) something unusual -- perhaps worthy of collecting
peculiarity, specialness, specialty, speciality, distinctiveness
(noun) a distinguishing trait
peculiarity, distinctive feature, distinguishing characteristic
(noun) an odd or unusual characteristic
Source: WordNet® 3.1
Etymology
Noun
peculiarity (countable and uncountable, plural peculiarities)
The quality or state of being peculiar; individuality; singularity.
That which is peculiar; a special and distinctive characteristic or habit; particularity.
Exclusive possession or right.
Source: Wiktionary
Pe*cul`iar"i*ty, n.; pl. Peculiarities (.
1. The quality or state of being peculiar; individuality;
singularity. Swift.
2. That which is peculiar; a special and distinctive characteristic
or habit; particularity.
The smallest peculiarity of temper on manner. Macaulay.
3. Exclusive possession or right. [Obs.] Bp. Hall.
Source: Webster’s Unabridged Dictionary 1913 Edition