Contentment vs Happiness vs Feeling Alive vs Complacency

According to the dictionary:

Contentment - a state of happiness and satisfaction 
"Contentment, or the state of being content, is about peaceful satisfaction"

• https://theblissfulmind.com/feel-content-right-now/

Happiness - feeling of showing pleasure
"Happiness is a sense of well-being, joy, or contentment. When people are successful, or safe, or lucky, they feel happiness."
"Happiness is self-contentedness. - Aristotle"

• https://www.becomingminimalist.com/how-to-be-happy/

( more of my thoughts on this )