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

Footage posted on the Forecast Weather Greece Facebook page appeared to show two helicopters crossing paths at low altitude before the main rotor of the lower helicopter struck the underside of the one flying above it and crashed in flames. — Reuters, NBC news, 2 Aug. 2026

Rub herb mixture on the underside of chicken and under the skin. — Katlyn Moncada, Better Homes & Gardens, 1 Aug. 2026

Instead, use a Bug Blaster hose end sprayer to blast the upper and undersides of the leaves with water and blow the critters away. — Nan Sterman, San Diego Union-Tribune, 1 Aug. 2026

Officials said the woman was clinging to the underside of a rock while partially submerged in the river's swift, cold water. — Denis Akbari, USA Today, 1 Aug. 2026