No, the noun 'wilderness' is not a standard collective noun, however, collective nouns are an informal part of language. Any noun that suits the context of a situation can function as a collective noun, for example, 'a wilderness of talent' or 'a wilderness of hope'.
The noun 'wildlife' is an uncountable noun, a type of aggregate noun, a word representing an indefinite number of elements or parts.
The word wilderness is a noun
The noun wilderness can be singular or plural; wilderness is the singular, wildernesses is the plural form.
wildernesses
wilderness
No. A wilderness (the wilderness) is an unspecified place, like a city, and you can go there. An example of an abstract noun would be "wildness" that is a perceived but intangible aspect of the wilderness.
Yes, it is a noun. It means a wilderness expedition or hunting trip.
common noun
The abstract nouns are culture and wilderness, words for concepts.
Common
Common noun