No, the word 'one' when used for a general, unnamed person is an indefinite pronoun.
The word 'one' is a noun when used for a number or an amount.
No
Yes, the noun 'elegance' is a common noun, a general word for a quality of someone or something.
The noun criminologist is a singular, common noun, a word for someone who studies crime and criminals; the noun criminologist is a profession or a title for someone in that profession.
The plural form of the noun visitor is visitors.
It is a proper noun because it is the name if someone
Yes the word master can be a noun as in someone who has control over someone else. It is also a verb.
The noun 'abuser' is a singular, common, concrete noun; a word for someone who regularly or habitually mistreats someone or something; someone who indulges in corrupt customs or practices; a word for a person.
Yes, it is a noun. It means someone of a class of nobility.
Someone who is ungrateful is an ingrate
No, someone's name is not a pronoun. A pronoun is a word that can be used in place of a noun to avoid repetition. A name is a noun that specifically identifies a person or thing.
The word dependence is a noun, a non-count, common, abstract noun; a word for reliance on or control by someone or something; reliance on the financial support of someone or something.
The noun 'student' is a singular, common, concrete noun; a word for someone who is formally learning or someone who takes special interest in a subject; a word for a person.
The noun scientist is a singular, common noun, a word for someone who is trained in science, especially someone whose job is to do scientific research; a word for a person.