Synonyms for optional

Most common

voluntary · unrequired · nonmandatory · nonobligatory · discretional · omissible

All synonyms

Adjective

Antonyms

required, mandatory, necessary

All antonyms of optional →

Definitions

1. adj. 1

   Not compulsory; left to personal choice; elective.

   On that beach clothing is entirely optional.

Example sentences

• voluntary She did a lot of voluntary work for the Red Cross.

Popularity over time

Use in printed books, per decade from 1850 to 2019.

By length

4 letters

free¹

8 letters

elective³, unforced

9 letters

voluntary⁴, arbitrary⁴, omissible

10 letters

volitional, unrequired

11 letters

facultative⁴

12 letters

nonmandatory, discretional

13 letters

discretionary⁵, nonobligatory

The small number after each word is its number of syllables (elective³ = 3 syllables).

In other languages

Français

facultatif

Italiano

facoltativo

Español

opcional

Deutsch

freiwillig