10 entries under substantial topic. ×

7
insignificant(adjective, significant, little, meaningless)
3
trivial(adjective, serious, little, meaningless)
3
unimportant(adjective, important, little, meaningless)
0
doublespeak
0
low-ranking
0
purportless
0
shoestring
0
unmeaning
0
unpurposed
0
zipper
10 years ago|1.5k views|share |citing 
APASmart Define. (2016). meaningful thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/meaningful/thesaurus/antonyms
ChicagoSmart Define. 2016. "meaningful thesaurus" https://smartdefine.org/meaningful/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2016, meaningful thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/meaningful/thesaurus/antonyms>.
MLASmart Define. "meaningful thesaurus" 29 March 2016. Web. 28 September 2026. <https://smartdefine.org/meaningful/thesaurus/antonyms>