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

The conversation and the word itself, which gives the seventh and final episode its title, unlocks the Biblical underpinnings and the complexities governing many of the main characters. — Daniel Fienberg, HollywoodReporter, 1 Oct. 2026

The phone, the radio, the television, the fax, the cell, texting, video calls, AI—who among us truly grasps its underpinnings? — Literary Hub, 28 Sep. 2026

Verb

Hammer presents these economic theories as stone-cold truths without acknowledging the rather obvious ideological agenda underpinning his thinking. — Brady Brickner-Wood, New Yorker, 28 Sep. 2026

Beale, his hands on his hips, turned to face Sigcho-Lopez in the latest manifestation of the bad blood underpinning the council’s deep philosophical divisions. — Jake Sheridan, Chicago Tribune, 23 Sep. 2026