Synonyms for Specialty (same or very similar meaning)
WordNet sense 1 (an asset of special worth or utility):
forte, metier, speciality, strength, forte, long suit, strong suit, strong pointWordNet sense 2 (a distinguishing trait):
distinctiveness, peculiarity, specialnessWordNet sense 3 (the special line of work you have adopted as your career):
specialization, specialisation, specialismFrom the ODE community, based on WordNetadd/edit