The Collaborative International Dictionary
Coadventure
Coadventure \Co`ad*ven"ture\ (?; 135), n. An adventure in which two or more persons are partakers.
Coadventure
Coadventure \Co`ad*ven"ture\, v. i.
To share in a venture.
--Howell.
Wiktionary
coadventure
n. (context archaic English) A joint venture or partnership.