Is barracks a special noun

Answer 1

No, abstract nouns are sometimes referred to as special nouns. Abstract nouns are words for things that can't be experienced by any of the five senses; they can't be seen, heard, smelled, tasted, or touched.

The noun 'barracks' is a concrete noun, a word for something that can be experienced by the physical senses.

The noun 'barracks' is an uncountable noun, a word with no singular form. It is a type of aggregate noun, a word representing an indefinite number of elements or parts.