1) General subject: attribute, cachet, characteristic, characteristical, distinctive, habit, lineaments, peculiarity, quality, tang, the personal touch (человека), touch, trait, mark, defining attribute, mannerism, particularity
3) Colloquial: middle name
4) Economy: identifying feature
5) Diplomatic term: outstanding feature, salient feature, theme
6) Psychology: lineament
7) Information technology: specific feature
8) Advertising: characteristic feature, salient characteristic, speciality
9) Business: characteristics, distinctive feature, distinctiveness, feature, point
11) Makarov: streak
Универсальный русско-английский словарь. Академик.ру. 2011.