RichThesaurus
foundational
foundational
synonyms
primary
underlying
rudimentary
elementary
essential
basal
elemental
radical
central
primitive
original
principal
first
vital
bottom
intrinsic
cardinal
fundamental
meat-and-potatoes
basic
beginning
prime
key
necessary
introductory
indispensable
organic
critical
ingrained
pivotal
inherent
underived
constitutional
chief
initial
innate
simple
three R’s
crucial
staple
focal
primordial
salient
structural
underivative
ultimate
quintessential
substratal
root
preliminary
more synonyms
foundational
antonyms
secondary
unimportant
auxiliary
supplemental
advanced
trivial
unnecessary
highest
minor
hard
subordinate
superficial
top
intricate
involved
nonessential
extrinsic
compound
abstruse
complicated
difficult
final
complex
extra
additional