STRENGTHEN, STRENGTHENED
ADJECTIVES
1432 ► ROBORATE confirmed, ratified, strengthened → obs.
VERBS
1400 ► FASTEN to make firm or solid; to strengthen, to harden → obs.
1547 ► RANFORCE to strengthen, to fortify → obs.
1570 ► RAMFORCE to fortify, to strengthen a wall, rampart, etc.; to block up, to barricade a gate or door → chiefly Sc. obs.
1586 ► HEARTEN to strengthen with food or nourishment → obs.
1615 ► HEARTEN to strengthen, to help on, to further, to promote → obs.
1623 ► IRROBORATE to make strong, to strengthen → obs.
1656 ► CONVALIDATE to strengthen
1662 ► EFFORT to strengthen, to fortify → obs.
1682 ► NERVATE to nerve, to support, to strengthen → obs.
1793 ► INVIGOR to invigorate, to strengthen → Sc. obs.
1925 ► PEP UP to invigorate someone; to strengthen or enhance something → UK sl.
1941 ► BEEF UP to strengthen; to add vigour, power, or importance to → sl.
Lexicophilia 