Indeed it is.
The word 'World X' is a proper noun, the name of a company, World X Productions, LLC. A proper noun is the name of a person, place, thing, or a title. A proper noun is always capitalized. However, the word is a common noun when not referring to the above company. For example, 'When world X conflicts with world Y, a science fiction tale is born.' This use of 'world x' is a common noun.
The word supercalifragilisticexpialidocious is a word made up by Disney productions which is defined as an adjective, a word that describes a noun. Do not ask for an example sentence; I've never heard it used as an adjective. The only place I've ever seen this word in a sentence is to ask about the word or explain the word. Even in the song of the same name from 'Mary Poppins', it is only used for explanation.
Yes, the noun 'porch' is a common noun, a general word for any porch of any kind.A proper noun is the name of a specific person, place, or thing; for example:Porch Street, Portland, MEPorch Light Productions (theater group), Glen Rock, NJBack Porch Cafe, Watertown, TN"porch" is a regular noun
Yes, the word 'noun' is a noun, a word for a thing.
Yes, the word 'noun' is a noun, a word for a thing.
The word 'word' is a singular, common noun; a word for a thing.The noun 'word' is a concrete noun when spoken, it can be heard and when written, it can be seen.The noun 'word' is an abstract noun as in a kind word or a word to the wise.
The noun 'noun' is an abstract noun, a word for a concept.
The noun 'justice' is a concrete noun as a word for a judge or a magistrate, a word for a person.The word 'justice' is an abstract noun; a word for a quality of fairness and reason; a word for a concept.
The word 'noun' is not a verb. The word 'noun' is a noun, a word for a thing.
Yes the word classroom is a noun. It is a common noun.
The word 'teacher' is a noun, a singular, common, concrete noun; a word for a person.
A word is a thing. The word 'word' is a noun.