No, the word 'another' is not a noun.
The word another is an adjective and a pronoun.
Examples:
I'm busy today but we can meet another day. (adjective)
If you like the cookies, you may have another. (pronoun)
The word multiple is a noun, a singular, common noun; a word for a number that can be divided by another number without a remainder.
The word 'grateful' is an adjective, a word that describes a noun (grateful child); the noun form is gratefulness. Another noun form is gratitude. Both gratefulness and gratitude are common nouns.
Awning is another word for canopy but I'm not sure it's more common.The noun 'canopy' is a common noun, a word for any canopy of any kind.
Yes, the word 'bubble' is a noun, a singular, common, concrete noun; a word for a thin sphere of liquid enclosing air or another gas; a word for a thing.
Yes, the word noise is a common noun.
The word 'multiple' is a noun as well as an adjective. The noun multiple is a singular, common noun; a word for a number that can be divided by another number with no remainder. A number is a thing.
Another noun for elephant is pachyderm (pak-i-durm).
The word bicycle is a common noun.
The noun 'magazine' is a singular, common, concrete noun, a word for a thing.
The word friendship is a common, singular, abstract, compound noun.
My brother ate a cake. (The words 'brother' and 'cake' are common nouns.)I went to the supermarket. (The word 'supermarket is a common noun.)I like to eat cookies. (The word 'cookies' is a common noun.)I accidentally dropped my computer.(The word 'computer' is a common noun.)He likes to read books. (The word 'books' is a common noun.)She likes playing toys. (The word 'toys' is a common noun.)I like going to the gym. (The word 'gym' is a common noun.)She bought a pen. (The word 'pen' is a common noun.)I am doing my homework. (The word 'homework' is a common noun.)I am drawing a picture. (The word 'picture' is a common noun.)I am carrying my bag. (The word 'bag is a common noun.)The train will leave soon. (The word 'train' is a common noun.)I am eating breakfast. (The word 'breakfast' is a common noun.)I found a dog just now. (The word 'dog' is a common noun.)He sold his home. (The word 'home' is a common noun.)His friend fell sick. (The word 'friend' is a common noun.)I went to the airport. (The word 'airport is a common noun.)His bed is very messy. (The word 'bed' is a common noun.)I saw a baby just now. (The word 'baby' is a common noun.)The door was open. (The word 'door' is a common noun.)
The word 'mountaineering' is a noun, a common noun, a general word for an activity.