incidental Synonyms

accidental nonessential collateral fortuitous casual contingent unimportant concomitant consequent chance incidental expense resultant minor trivial insignificant incident serendipitous subsidiary ancillary peripheral attendant accompanying accessory secondary trifling undersheriff second unessential unconsequential uncaused sequent short-lived superfluous subordinate stray supervenient supplemental side supplementary tangential unforeseeable unlooked nonobligatory accidentary unintentional part-time beside the point by accident unintended lippening