'Which' can be used as an interrogative pronoun or a relative clause.
'One' is just a numberal in the cardinal sense.
'Which one' is a going to be a question, made up of both the pronoun and number. It's not an adjective though.
One word is "nostalgic" (the adjective form of nostalgia).
Yes. The adjective is one word overall.
Not the phrase. The word "which" is used as an adjective, but "one" following it would be a noun.
The noun and adjective are one word, firstborn (first of children).
No. The word pair means two items, often of a similar kind. The word "paired" is one adjective form.
One adjective from the word "reason" is "reasonable."
One word is "nostalgic" (the adjective form of nostalgia).
it is one
Yes. The adjective is one word overall.
No. Investigate is a verb. One adjective form is the word "investigative."
Not the phrase. The word "which" is used as an adjective, but "one" following it would be a noun.
Yes, it is one word, the verb or adjective overheard.
The word boundary is a noun. The word divergent is an adjective. Neither one is a verb.
No. The word pair means two items, often of a similar kind. The word "paired" is one adjective form.
The noun and adjective are one word, firstborn (first of children).
No, the word 'lowest' is an adjective, a word used to describe a noun. The adjective 'lowest' is the superlative form of the adjective low.The word 'low' is a verb, an adjective, and a noun.The noun 'low' is a word for a down level, value, price, or temperature; a word for a bad time in one's life; a word for a thing.The noun form of the adjective 'low' is lowness.
Versatile!!