THESAURUS
Retain
absorb, balance, ballast, bear in mind, bespeak, book, bottle up, brief, brood over, cherish, cite, commission, conserve, contain, cork up, counterbalance, detain, dwell on, dwell upon, employ, engage, enjoy, extend, fan the embers, firm, firm up, freeze, hang on to, have in mind, hire, hold, hold back, hold in, hold in mind, hold on to, husband, immobilize, inhibit, keep, keep alive, keep back, keep by one, keep going, keep in, keep in memory, keep in mind, keep in reserve, keep in store, keep in view, keep on hand, keep out, keep up, lay by, lengthen, lock in, maintain, memorize, mind, nail down, own, perpetuate, pin down, possess, preengage, preserve, prolong, protract, put apart, put aside, put by, recall, recollect, recruit, remember, remind, reminisce, repress, reserve, retrospect, revive, save, save up, set apart, set aside, set by, sign on, sign up, sign up for, soak up, stabilitate, stabilize, steady, stick, suppress, sustain, take into employment, take on, transfix, treasure, withhold
ROGET THESAURUS
Retain
Retention
VB
retain, keep, hold fast one's own, hold tight one's own, hold fast one's ground, hold tight one's ground, clinch, clench, clutch, grasp, gripe, hug, have a firm hold of, secure, withhold, detain, hold back, keep back, keep close, husband, reserve, have in stock, have on hand, keep in stock, entail, tie up, settle.
Stability
VB
be firm, stick fast, stand firm, keep firm, remain firm, weather the storm, stay the course, stick to the course, keep the faith, don't give in, don't buckle under, settle, establish, stablish, ascertain, fix, set, stabilitate, retain, keep hold, make good, make sure, fasten, set on its legs, float, perpetuate, settle down, strike roots, put down roots, take root, take up one's abode, build one's house on a rock.