Synonyms for Deadline:

n.

the last minute, due, closing date, sunset provision, timing, sell-by date, play date, time limit, due date. due date (noun)
time limit, cutoff, limit.
limit (noun)
zenith, brink, fringe, restriction, edge, confines, limit, cutoff, extremity, maximum, limitation, boundary, apex, bounds, border, end, acme, terminus, rim.

Other synonyms:

sunset provision, sell-by date, time limit, due date. play date, timing, closing date. due. Other relevant words:
closing date, due date, time limit, timing, due.

Usage examples for deadline

  1. I promised Betty to follow the accountant's advice and set a deadline of expenses. – Dawson Black: Retail Merchant by Harold Whitehead
  2. I will meet the Intelligencer's deadline as I did before your father got the first tepidly lustful idea in his nulliparous head and as I shall after you have followed your useless testes to a worthy desuetude. – Greener Than You Think by Ward Moore