Part of speech
What part of speech is 'oil' in the phrase 'oil supply'? Is it an noun or an adjective?

Question

Part of speech
What part of speech is 'oil' in the phrase 'oil supply'?  Is it an noun or an adjective?

Answer

It's a noun.

'Oil supply' is a compound noun in which the first noun modifies the second.

Answer

Some nouns can be used as adjectives when placed in front of another noun.  In this case, they answer the question "What kind of? "

Possessive nouns are also adjectives.

Answer

its noun. we can make a phrase with two or more nouns