speciality (specialities plural )
1 n-count Someone's speciality is a particular type of work that they do most or do best, or a subject that they know a lot about.
(mainly BRIT)
My father was a historian of repute. His speciality was the history of Germany...
in AM, usually use specialty
2 n-count A speciality of a particular place is a special food or product that is always very good there.
(mainly BRIT)
Rhineland dishes are a speciality of the restaurant...
in AM, usually use specialty