Scottish vs British English

Scottish and British English both are nouns.

Word	Noun	Adjective	Verb	Adverb
Scottish	Yes	Yes	No	No
British English	Yes	No	No	No

As nouns, British English is a hypernym of Scottish; that is, British English is a word with a broader meaning than Scottish:

Other hypernyms of Scottish include UK English.

Scottish (noun)	British English (noun)
the dialect of English used in Scotland	English as spoken in the UK

Scottish (adjective)	British English (adjective)
of or relating to or characteristic of Scotland or its people or culture or its English dialect or Gaelic language