6
unreasoning(adjective, characteristic, thoughtlessness, silliness)
5
imprudent(adjective, characteristic, thoughtlessness, silliness)
5
unheeding(adjective, characteristic, thoughtlessness, silliness)
5
witless(adjective, characteristic, thoughtlessness, silliness)
4
active(adjective, activity, characteristic, involvement)
4
flighty(adjective, characteristic, thoughtlessness, silliness)
4
ill-considered(adjective, characteristic, thoughtlessness, silliness)
4
negligent(adjective, characteristic, thoughtlessness, silliness)
4
undiscerning(adjective, characteristic, thoughtlessness, silliness)
4
unreasonable(adjective, characteristic, thoughtlessness, silliness)
3
careless(adjective, characteristic, thoughtlessness, silliness)
3
confused(adjective, characteristic, thoughtlessness, silliness)
3
doltish(adjective, characteristic, thoughtlessness, silliness)
3
dull(adjective, characteristic, thoughtlessness, silliness)
3
foolish(adjective, characteristic, thoughtlessness, silliness)
3
ill-advised(adjective, characteristic, thoughtlessness, silliness)
3
inadvertent(adjective, characteristic, thoughtlessness, silliness)
3
inane(adjective, characteristic, thoughtlessness, silliness)
3
incomprehensible(adjective, characteristic, thoughtlessness, silliness)
3
injudicious(adjective, characteristic, thoughtlessness, silliness)
11 years ago|130 views|share |citing 
APASmart Define. (2015). ruminative thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/ruminative/thesaurus/antonyms
ChicagoSmart Define. 2015. "ruminative thesaurus" https://smartdefine.org/ruminative/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2015, ruminative thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/ruminative/thesaurus/antonyms>.
MLASmart Define. "ruminative thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/ruminative/thesaurus/antonyms>