Things that modify nouns are adjectives or equivalent to adjectives.

Things that modify nouns (adjective, or adjectival equivalent).

Suffixes, 1: "-ion" creates nouns that show the meaning of 'action, state, process, results,' and so on.

Alex seemed to learn nouns such as "paper," "key" and "cork," and color names such as "red," "green" and "yellow."

Sometimes a verb is derived from a noun and sometimes it is the other way around.

In English there are eight main parts of speech: noun, verb, adjective, adverb, pronoun, preposition, conjunction and finally interjection.