1
substrative(important, significant, original, basic, vital)
1
supporting(important, significant, original, basic, vital)
1
sustaining(important, significant, original, basic, vital)
1
theoretical(important, significant, original, basic, vital)
1
unalienable
1
underived(important, significant, original, basic, vital)
1
underlined(important, essential, critical, basic, fundamental)
1
unforgoable
1
want
0
panties
0
advantageous(adjective, constructive)
0
ask
0
basilar
0
blackmail
0
bottom line(expression, important, significant, essential, basic)
0
brass
0
bread
0
breeches
0
bucks
0
built-in
11 years ago|8.7k views|share |citing 
APASmart Define. (2015). indispensable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/indispensable/thesaurus/synonyms
ChicagoSmart Define. 2015. "indispensable thesaurus" https://smartdefine.org/indispensable/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, indispensable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/indispensable/thesaurus/synonyms>.
MLASmart Define. "indispensable thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/indispensable/thesaurus/synonyms>