Synonyms of underside

underside

noun

ˈən-dər-ˌsīd 

as in bottom

the side or part facing downward from something

the underside of the cat's coat is pure white

Synonyms & Similar Words

• bottom
• undersurface
• floor
• seat
• underbelly
• underpart
• foot
• underbody
• belly
• sole
• toe
• base
• ground
• underpinning
• undercarriage

Antonyms & Near Antonyms

• top
• face
• roof
• apex
• crest
• height
• crown
• peak
• pinnacle
• summit
• meridian
• climax
• head
• tip
• culmination
• point
• zenith
• acme
• cusp
• high-water mark
• tip-top

Example Sentences

Recent Examples of underside

By early summer, the tents sag like dirty diapers from the undersides of boughs. — Ben Crair, New Yorker, 31 July 2026

The busy section of road had been closed since July 13, when a truck traveling east clipped the underside of the span. — Joseph Flaherty, Arkansas Online, 30 July 2026

Divers captured video footage of Galápagos sharks approaching manta rays and deliberately rubbing parts of their bodies, especially their heads, gill regions and sides, against the mantas’ undersides. — Melissa Cristina Márquez, Forbes.com, 28 July 2026

The underside holds two disks, each with six blades, that are powered by two 180W cutting motors. — John R. Delaney, PC Magazine, 28 July 2026