Explanation

The phrase "an old-fashioned hat" is a noun phrase because:

1. "hat" is the main noun (head of the phrase).
2. "an" is a determiner (article) modifying the noun.
3. "old-fashioned" is an adjective describing the noun "hat."

Explanation

Abyss is a noun.

The name of anything is called Noun. 

Abyss means a bad situation. 

Abyss of war means  جنگ کی خراب صورتحال

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Explanation

The opposite gender of wizards is a witch.

A witch is the female

and a wizard is the male.

Explanation

Both LANDLORD and Landlady are nouns.

LANDLORD means جاگیر دار

Landlady means جاگیردارنی

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Explanation

Lion is a noun. 

Masculine Gender: Lion 

Feminine Gender: Lioness 

Lion means شیر 

Lioness means شیرنی

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Explanation

Aunty means چاچی یا مامی

Aunty is a noun 

Plural of Aunty is Aunties. 

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Explanation

Buy means خریداری

Buy is a noun.

The plural form of buy is buys.

Explanation

'Police' is a collective noun.

A collective noun may sound singular but we use it to represent a group or a collection of people, animals, or things.

Explanation

The noun 'boy' is not a proper noun.

It is a common noun because it does not give the name of a specific boy.

A Few examples of proper nouns are India, January, Christmas, Monday, Alex, Meera, etc.

A Few examples of common nouns are table, chair, book, boy, girl, bedroom, school, college, etc.

Explanation

 a noun phrase has a noun as its Head. Determiners and adjective phrases usually constitute the pre-Head string:

[NP the children]

[NP happy children]