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

Inspect your roses often, especially tender new growth and the undersides of leaves where pests like to hide. — Madeline Buiano, Martha Stewart, 9 Aug. 2026

On-device controls are very basic, consisting of a rocker and a button on the underside of the left temple. — Will Greenwald, PC Magazine, 6 Aug. 2026

Use a microfiber cloth or a duster to wipe the top and underside of each leaf. — Karen Brewer Grossman, Southern Living, 3 Aug. 2026

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