Synonyms for Not difficult:

• adj.

  •simple (adjective)
  • Incomplex,
  • untroublesome,
  • transparent,
  • self-explanatory,
  • no problem,
  • child's play,
  • manageable,
  • facile,
  • effortless,
  • uninvolved,
  • snap,
  • easy as pie,
  • light,
  • picnic,
  • plain,
  • elementary,
  • intelligible,
  • cincher,
  • walkover,
  • simple as abc,
  • piece of cake,
  • straightforward,
  • snapper,
  • lucid,
  • smooth,
  • mild,
  • clean,
  • no sweat,
  • quiet,
  • cinch,
  • unmistakable.
  •uncomplicated (adjective)
  • obvious,
  • basic,
  • apparent,
  • evident,
  • clear.

• Other synonyms:

  •adj.
  • uncomplicated,
  • nothing to it,
  • painless,
  • simple,
  • easily done,
  • no bother,
  • no trouble,
  • not burdensome.

Antonyms for Not difficult:

• adj.

  • simple
    decorated, smart, unintelligible, mature, hard, difficult, exacting, on-the-ball, intelligent, embellished, jumbled, older, aware, convoluted, sophisticated, cluttered, complicated, intricate, involved, complex, unclear, vague, ornate, abstruse.