77 entries under foundation topic. ×

23
core(noun, adjective, organization, support, action)
21
heart(noun, support, action, part, quality)
19
essence(noun, organization, support, action, area)
17
pith(noun, organization, area, part, quality)
13
nub(noun, part, quality, body, cause)
12
substance(noun, organization, area, part, quality)
9
nucleus(noun, support, action, quality, body)
8
marrow(noun, quality, cause, start, character)
7
basis(noun, organization, action, area, quality)
7
thrust(noun, part, body, strength, idea)
6
pivot(noun, support, body, cause, point)
5
quintessence(noun, quality, cause, start, character)
4
base(adjective, organization, support, action, quality)
4
body(noun, area, part, strength, effect)
3
center(noun, support, action, body, cause)
3
fundamental(noun, support, action, cause, start)
3
keystone(noun, support, action, idea, base)
3
root(noun, support, action, quality, cause)
3
significance(noun, quality, body, character, strength)
3
soul(noun, force, quality, cause, start)
11 years ago|9.6k views|share |citing 
APASmart Define. (2015). crux thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/crux/thesaurus/synonyms
ChicagoSmart Define. 2015. "crux thesaurus" https://smartdefine.org/crux/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, crux thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/crux/thesaurus/synonyms>.
MLASmart Define. "crux thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/crux/thesaurus/synonyms>