-er/-or
* Teacher (from the verb "teach")
* Actor (from the verb "act")
* Writer (from the verb "write")
-ment
* Movement (from the verb "move")
* Payment (from the verb "pay")
* Agreement (from the verb "agree")
-ness
* Happiness (from the adjective "happy")
* Sadness (from the adjective "sad")
* Kindness (from the adjective "kind")
-ity/-ty
* Creativity (from the adjective "creative")
* Clarity (from the adjective "clear")
* Security (from the adjective "secure")
-tion/-sion/-ation
* Education (from the verb "educate")
* Decision (from the verb "decide")
* Organization (from the verb "organize")
-ance/-ence
* Importance (from the adjective "important")
* Independence (from the adjective "independent")
* Confidence (from the adjective "confident")
-ship
* Friendship (from the noun "friend")
* Relationship (from the noun "relation")
* Scholarship (from the noun "scholar")
-hood
* Childhood (from the noun "child")
* Adulthood (from the noun "adult")
* Neighborhood (from the noun "neighbor")
-ism
* Capitalism (from the adjective "capitalist")
* Communism (from the adjective "communist")
* Realism (from the adjective "realistic")
These are just a few examples. There are many other derivational suffixes that can be used to form nouns, and the specific suffix used will depend on the word being formed.