Coincidental vs. Incidental

Occurring as or resulting from coincidence.

Occurring or likely to occur as an unpredictable or minor consequence

Happening or existing at the same time.

Of a minor, casual, or subordinate nature

Occurring as or resulting from coincidence.

A minor accompanying item or expense

Happening or existing at the same time.

Loosely associated; of limited relevance except indirectly; only accident related.

Coincident.

Existing tangentially, being a byproduct, a tangent, or a likely consequence.

Occurring or operating at the same time;

Occurring by chance.

Entering or approaching, prior to reflection (more frequently incident).

Minor items, not further defined. Incidental expense.

Something that is incidental.

Happening, as an occasional event, without regularity; coming without design; casual; accidental; hence, not of prime concern; subordinate; collateral; as, an incidental conversation; an incidental occurrence; incidental expenses.

An incident; that which is incidental; esp., in the plural, an aggregate of subordinate or incidental items not particularized; as, the expense of tuition and incidentals.

(frequently plural) an expense not budgeted or not specified;

An item that is incidental

(sometimes followed by `to') minor or casual or subordinate in significance or nature or occurring as a chance concomitant or consequence;

Following as a consequence;

Not of prime or central importance;