ACCIDENTAL, ACCIDENTALLY
ADJECTIVES
► ADVENTUROUS accidental, occurring or coming by chance; casual, fortuitous → 1374 obs.
► ALEATORY accidental, chance, occurring randomly → 1693
► COME-BY-CHANCE accidental → 19C Eng. dial.
► CONTINGENT accidental, happening or coming by chance → 1604
► FORTUITOUS accidental, unexpected; happening by fortune or chance → 1653
► UNPREMEDITATED accidental, unintended, unplanned, spontaneous → 1597
ADVERBS
► ACCIDENTLY accidentally, by chance, casually → 1611 obs.
► ADVENTURELY accidentally, by chance → 1400 obs.
► ADVENTUROUSLY accidentally by chance, casually → 1460 obs.
► CASUALLY accidentally → 1386 obs.
► HAPLY by accident or chance; perhaps; maybe → 1362 arch.
► INADVERTENTLY accidentally, unintentionally → 1678
► UNWITTINGLY accidentally, unintentionally, unknowingly → 1425
NOUNS
► CONTINGENT a thing coming by chance, an accident → 1548
► HAPPENSTANCE an accidental occurrence → 1857
Lexicophilia 