Inexorable rhymes with:
answerable, unanswerable, admirable, adorabelle, answerable, comparable, considerable, deliverable, discoverable, dishonorable, favorable, honorable, imponderable, incomparable, innumerable, inoperable, inseparable, insufferable, intolerable, invulnerable, irreparable, maneuverable, measurable, memorable, miserable, operable, pleasurable, preferable, recoverable, tolerable, unalterable, unanswerable, unfavorable, venerable, vulnerable
Inexorable sounds like:
immeasurable, immeasurably, incurable, inexorably