hap (n.)
- accident
- adventure
- break
- casualness
- casualty
- chance
- circumstance
- come
- contingency
- contingent
- destiny
- episode
- event
- experience
- fact
- fall
- fate
- fluke
- fortuitousness
- fortuity
- fortune
- gamble
- go
- happening
- happenstance
- hazard
- incident
- indeterminacy
- indeterminateness
- lot
- luck
- muffle
- occasion
- occurrence
- opportunity
- particular
- pass
- phenomenon
- portion
- probability
- reality
- risk
- serendipity
- uncertainty