incindental

Incindental is a synonym of fortuitous.

As an adjective fortuitous is

happening by chance; coincidental or accidental.

Incindental is a synonym of chance.

As a proper noun chance is

, an american pet form of chauncey, in modern usage also associated with the word chance.

Incindental is a synonym of contingent.

As a noun contingent is

an event which may or may not happen; that which is unforeseen, undetermined, or dependent on something future; a contingency.

As an adjective contingent is

possible or liable, but not certain to occur; incidental; casual.

Incindental is a synonym of casual.

As an adjective casual is

happening by chance.

As a noun casual is

(british|nz) a worker who is only working for a company occasionally, not as its permanent employee.

Incindental is a synonym of collateral.

As an adjective collateral is

collateral.