Mischance, n.
Etymology: [OE. meschance, OF. mescheance.]
Ill luck; ill fortune; mishap. Chaucer. Never come mischance between us twain. Shak.
Syn. -- Calamity; misfortune; misadventure; mishap; infelicity; disaster. See Calamity.
1 other Webster entry under this spelling
Mischance, v. i.
To happen by mischance. Spenser.
Shades of meaning
Fernald has no entry of its own for mischance; he lists it under catastrophe, misfortune.
Where he writes about it:
Pestilence is a calamity; a defeat in battle, a shipwreck, or a failure in business is a disaster; sickness or loss of property is a misfortune; failure to meet a friend is a mischance; the breaking of a teacup is a mishap. — from catastrophe