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

Monday when something struck the underside of his kayak, throwing him into the water, the Cambria Fire Department said in a Facebook post. — Brittany Miller, FOXNews.com, 27 Oct. 2026

The undersides of the leaves tend to have a pink or magenta hue with variegation more obvious at night when the leaves fold before reopening during the day. — Lauren David, Better Homes & Gardens, 25 Oct. 2026

Only the lengthwise, or warp, yarns are dyed, while the crosswise, or weft, yarns remain undyed, giving denim its characteristic blue face and lighter underside. — Britannica Editors, Encyclopedia Britannica, 23 Oct. 2026

This is because spiders seek out dark, damp, undisturbed places like the underside of a rock or rotting wood. — Sarah Everett, The Spruce, 23 Oct. 2026