Possessiveness and jealousy are similar.

Difference is that jealousy is a feeling. Someone might feel jealous in private but never even tell anyone, we all feel jealous at times. It’s a feeling that we don’t necessarily act on

Possessiveness is acting on those feelings. Telling your wife that you want her to stay home versus going out with friends or not wanting her to look good because she belongs to you is acting possessive.