spreading
The word either can be an adjective. Another word to use is whichever.
When using an adjective to describe one thing, use the positive degree. (Wikipedia)
adverbs
attractive
A term use as an adjective to modify the noun.
Happy is already an adjective.
Yes, you can use the adjective dramatic.
The adjective form for the verb to use is the past participle, used (a used car).The adjective form for the noun use is useful(useful information).
Worldwide (or world-wide) is an adjective. Meaning spread throughout the world
Not except in a colloquial meaning. Noise is a nounreferring to a sound, or to sounds in general.The near-archaic verb use is to mean "spread a report or rumor."
Yes, It Almost Has The Meaning As The Adjective.
Yes, the term 'untidy clothes' is a correct use of the adjective.
the adjective is captive - the noun is captivity
Yes you can use it as an adjective by saying someone is 'arachnophobic'
An adjective describes a noun.
a good adjective is ugly
"Obsolete" is an adjective. It describes something that is no longer in use or outdated.