Synonyms: unessential, inessential
Definition: not basic or fundamental
Similar words: accessorial
Definition: nonessential but helpful
Usage: accessorial services included sorting and packing
Similar words: adscititious
Definition: supplemental; not part of the real or essential nature of a thing
Usage: adscititious vowels
Similar words: incidental, nonessential
Definition: not of prime or central importance
Usage: nonessential to the integral meanings of poetry- Pubs.MLA