Synonyms of underpinning

underpinning 1 of 2

noun

ˈən-dər-ˌpi-niŋ 

1

as in basis

an immaterial thing upon which something else rests

the underpinnings of the theory have recently been called into question

Synonyms & Similar Words

• basis
• foundation
• bedrock
• cornerstone
• justification
• groundwork
• base
• root
• support
• framework
• premise
• ground
• core
• keystone
• theory
• footing
• warp
• essence
• infrastructure
• focus
• warp and woof
• bottom
• rationale
• assumption
• backbone
• thesis
• shore
• anchorage
• heart
• prop
• center
• substratum
• kernel
• warrant
• presumption
• bed
• mount
• substructure
• stay
• buttress
• brace
• presupposition
• bulwark
• supposition
• nucleus
• hub
• seat
• touchstone
• soul
• eye
• quintessence

2

as in support

a structure that holds up or serves as a foundation for something else

the underpinnings of the bridge were seriously damaged in the collision

Synonyms & Similar Words

• support
• reinforcement
• shore
• pillar
• foundation
• mounting
• brace
• prop
• mount
• spur
• stay
• buttress
• crutch
• shoring
• column
• truss
• arch
• bracket
• cantilever
• stand
• pedestal
• bolster
• frame
• stake
• bearing
• peg
• pilaster
• girder
• base
• strut
• post
• stilt
• stanchion

underpinning

2 of 2

verb

present participle of underpin

as in sustaining

to hold up or serve as a foundation for

the central beliefs that underpin a free society

Synonyms & Similar Words

• sustaining
• supporting
• carrying
• bolstering
• upholding
• staying
• undergirding
• buttressing
• bracing
• underlying
• bearing
• propping (up)
• shoring (up)
• steadying
• trussing

Example Sentences

Recent Examples of underpinning

Noun

That dichotomy between health and dreams is the underpinning beneath the novelty of Buzzard’s college football odyssey. — Christian Babcock, Mercury News, 30 Aug. 2026

That commitment became the underpinning for Paramount's offer to sign contracts with Hollywood exhibitors, at least one of which took the offer, according to the person familiar. — Lillian Rizzo, CNBC, 24 Aug. 2026

Verb

And the looming reality underpinning all of it is that, at some point between now and 2030, some (not all) of the current main characters, the faces of the program, could begin to fade. — Henry Bushnell, New York Times, 15 Sep. 2026

Interventions can include removing trees and vegetation or constructing barriers to isolate their roots from the house’s foundations and, at the more extreme and expensive end, underpinning the house by pumping concrete beneath the foundations. — Laura Paddison, CNN Money, 11 Sep. 2026