Synonyms for Inessential:

adj.

all (adjective)
unessential.
immaterial (adjective)
meaningless.
unimportant (adjective)
inconsequential, irrelevant, meaningless, mere, minor, petty, superficial, unconsidered, unimportant, of no consequence/of little consequence.
unnecessary (adjective)
dispensable, irrelevant, needless, nonessential, uncalled-for, unessential, unneeded, unrequired.
unsubstantial (adjective)
apparitional, chimerical, empty, ethereal, illusory, immaterial, impalpable, insignificance, intangible, nonexistence, null, phantasmal, spectral, tenuous, unreal, unsubstantial, vacant, vacuous, weightless, unconcrete.

n.

dispensable, necessary, needless, uncalled-for, unnecessary, unneeded, unrequired. inessential (noun)
complemental, complementary, completing, incidental, nonessential, unessential.
object (noun)
nonessential.

Other synonyms:

unrequired. dispensable, needless, uncalled-for. Other relevant words:
complemental, complementary, completing, dispensable, incidental, inconsequential, irrelevant, minor, needless, nonessential, petty, superficial, uncalled-for, unessential, unimportant, unnecessary, unneeded, unrequired.

Usage examples for inessential

  1. They seemed to her inessential – Hilda Lessways by Arnold Bennett
  2. It was by realising this fact, and applying his exceptionally fine critical intuition to this task, that Professor Raleigh, considering the essentials, was able to draw a very much more convincing picture of the personality of Shakespeare than that which was drawn, brilliantly indeed, by Mr. Frank Harris; but Mr. Harris, I think, devoted his attention to qualities in Shakespeare which- whether in any sense real or not- were in any case secondary and inessential elements in the dramatist's character. – Personality in Literature by Rolfe Arnold Scott-James
  3. She had been afraid of a hundred contingencies only this morning, fretted with tiny necessities, annoyed by inessential details. – Undertow by Kathleen Norris