0
operational(happening, ongoing, started)
0
operative(happening, ongoing, started)
0
optional
0
proceeding(happening, ongoing, started)
0
progressing(constant, current, continuous, happening, ongoing)
0
rapid-fire
0
shadowy(adjective, unknown, unfixed, unlimited, unspecified)
0
started(happening, ongoing)
0
unanswered
0
unasked
0
uncertain(adjective, unknown, unfixed, unlimited, unspecified)
0
unclear(adjective, vague, unknown, unfixed, undecided)
0
unconditional
0
uncontrolled
0
undependable(adjective, unknown, unfixed, unlimited, unspecified)
0
under way(expression, happening, ongoing, started)
0
unfinished(constant, current, continuous, happening, ongoing)
0
unfixed(adjective, unknown, undecided, unlimited, unspecified)
0
unfolding(constant, current, continuous, happening, ongoing)
0
unknown(adjective, unfixed, unlimited, unspecified)
11 years ago|6.2k views|share |citing 
APASmart Define. (2015). open-ended thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/open-ended/thesaurus/synonyms
ChicagoSmart Define. 2015. "open-ended thesaurus" https://smartdefine.org/open-ended/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, open-ended thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/open-ended/thesaurus/synonyms>.
MLASmart Define. "open-ended thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/open-ended/thesaurus/synonyms>