RichThesaurus
underpinning
underpinning
synonyms
base
foundation
footing
groundwork
support
substratum
basis
bedrock
infrastructure
substructure
root
prop
stay
cornerstone
heart
buttress
brace
bottom
column
foot
essence
understructure
ground
core
stanchion
nub
bed
post
upright
shore
abutment
reinforcement
reason
seat
cause
evidence
nitty-gritty
brass tacks
strut
justification
fundamentals
nuts and bolts
crux
fundamental
basics
pillar
nucleus
starting point
pier
kernel
more synonyms
underpinning
antonyms
top
derivation
derivative
sprout