Synonyms for Gradual:

adj.

gentle (adjective)
easy, imperceptible.
piecemeal (adjective)
step by step.
progressive (adjective)
enterprising, progressive, advanced, incremental, Furthered.

n.

gently, highland, craggy, rolling, alpine, mountainous, hilly, graded. rise. creeping (noun)
continuous, regular.
gradual (noun)
gentle, in small stages, gradational, graduated, gradatory, easy, stepwise, step by step, piecemeal, sloping, bit by bit.

Other synonyms:

craggy, cosmetic, graded, radically, hilly, mountainous, drastic, gently, alpine, evolutionary. highland, rolling, developmental, quicksilver. radical. away. bit-by-bit
bit by bit.
step-by-step
step by step.

Usage examples for gradual

  1. Believe that every man, worthy to be called a man, has in him the promise of the gradual supremacy of character over the accidents and happenings of circumstances. – Men in the Making by Ambrose Shepherd
  2. Growth is most gradual in the highest forms. – Natural Law in the Spiritual World by Henry Drummond
  3. Immediate cures are the exception, and it will be safer for us to look forward to a gradual and progressive improvement. – The Practice of Autosuggestion by C. Harry Brooks