32 entries under adjective topic. ×

3
principal(important, foremost, second-to-none)
1
arterial
1
central
1
chief
1
foremost
1
grand
1
main
0
astral
0
crucial
0
dominant
0
great
0
nuclear
0
overriding
0
paramount
0
pivotal
0
pre-eminent(foremost, second-to-none)
0
predominant
0
preponderant
0
prevailing
0
primal
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APASmart Define. (2015). mainline thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/mainline/thesaurus/synonyms
ChicagoSmart Define. 2015. "mainline thesaurus" https://smartdefine.org/mainline/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, mainline thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/mainline/thesaurus/synonyms>.
MLASmart Define. "mainline thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/mainline/thesaurus/synonyms>