incidental Synonyms

accidental contingent incident serendipitous chance nonessential collateral concomitant consequent fortuitous casual attendant accompanying resultant incidental expense trifling trivial uncaused unconsequential undersheriff random unessential grace note tangential supplementary subordinate sequent subsidiary superfluous secondary second supervenient supplemental qualifying unlooked unlooked-for noncausal nonobligatory accidentary unintentional beside the point by accident unintended lippening nickel-and-dime unforeseeable minor expense unimportant irrelevant part-time