re·gion·al·ism 
/ˈri:ʤənəˌlɪzəm/ noun
plural re·gion·al·isms /ˈri:ʤənəˌlɪzəm/ noun 1 [noncount] : interest in or loyalty to a particular region
▪ The residents have a strong sense of regionalism. 2 [count] : a word that is used in a particular region
▪ The word “pop” for “soda” is a Midwest regionalism.
▪ The residents have a strong sense of regionalism.
▪ The word “pop” for “soda” is a Midwest regionalism.
