happenchance
/ˈhap(ə)ntʃans/ /ˈhap(ə)ntʃɑːns/originally regional and informal
noun
A chance occurrence; (good or bad) fortune, chance, luck.
adjective
Characterized by or resulting from chance or luck; random, haphazard.
Origin
Mid 19th century. Apparently from happen + chance, although perhaps compare happenstance.