[UK and ANZ] usually -isation [noun]In the course I'm taking, there's no opportunity for specialization (= limiting my studying or work to one particular area) until the final year. [U]The lawyer said that he was unable to help us because our case fell outside his specialization (= his particular area of knowledge). [C]
SPECIALIZATION
Meaning of SPECIALIZATION in English
Cambridge English vocab. Кембриджский английский словарь. 2012