Action
Behavior
noun, verbal noun, の adjective
When you go to move you're actually making an action. This word can also mean behavior, since your actions are what make up your behavior.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
彼は毎日同じ時間に同じ行動をします。
He does the same action at the same time every day.
いつもコウイチの行動パターンは決まっている。
Koichi's behavioral patterns are always the same.
あの人は発言と行動が一致していない。
That person's words and actions don't match up.