SOLVER: 1. RESOLVE, FIND. 2. INF. ACQUIT: FORGIVE, WAIVE, RELEASE.
SOLVER: FIND, RESOLVE, CLARIFY, REMOVE.
In an old grammar of 1886, encounter solver as a verb whose irregular past participle ( or abnormal as said ) it is loose. So that solver would be equivalent to release. I leave there the concern and I hope contributions thereon.