open-ended
adjective
boundless, ceaseless, changing, continued, continuing, expansive, going on, illimitable, illimited, indecisive, indefinite, indeterminable, inexact, infinite, interminable, limitless, loose, measureless, modifiable, not particular, not specific, ongoing, termless, unbounded, unbridled, unceasing, unconfined, unconstrained, uncontrolled, undefined, unending, unlimited, unmeasured, unrestricted, vague, variable, wide-open, without limits, without specified limits
Burton's Legal Thesaurus.
William C. Burton.
2006