Using a long phrase like "Purpose, connection, and what it means to be a human" seems preferable to enabling supernatural belief to slink in through the gap in the now-ambiguous word "spirituality". I say leave it to Madame Blavatsky. Oh wait that's spiritualism. Same difference.
Ooh, how about zeitgeist? I like that word. Then you'd still have spirits, but rational German ones.
What’s your proposed alternative for flourishing, content, joyful human lives?
I intentionally use the word because fellow atheists and positivists are too uncomfortable with it, and I believe the world needs more of it.
Yes, I'm pro-science and rational thought, but I'm increasingly thinking people like me have spent too long in left brain land and need to explore some of the deeper, subtle, and more intuitive parts of what it means to be a human, if that makes any sense.