Collocations for regain - verb

completely, fully
He hadn't completely regained his strength.

quickly, rapidly
soon
She soon regained her composure.

gradually, slowly
eventually, finally
never
He was severely injured and never regained consciousness.

attempt to, battle to, fight to, struggle to, try to
She struggled to regain her composure.

be desperate to, be determined to, hope to
He was determined to regain what his father had lost.

help sb (to)
manage to
be unable to, fail to

an attempt to regain sth, a bid to regain sth, an effort to regain sth
He is making a bid to regain his number-one ranking.

a chance to regain sth, an opportunity to regain sth
a chance to regain the lead in the contest

Regain is used with these nouns as the object:
appetite, balance, bearing, breath, calm, championship, composure, confidence, consciousness, control, credibility, crown, custody, dignity, faith, feeling, fitness, foothold, footing, form, health, hearing, independence, initiative, lead, memory, mobility, momentum, poise, popularity, posture, sanity, seat, self-control, self-respect, semblance, sense, shape, sight, splendour, status, strength, throne, trust, use, vigour, vision, will