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

Fabric content and care labels work for clothing, but furniture and decor often have maker’s stamps, labels, or engravings on the underside or back. — Symiah Dorsey, Southern Living, 26 Sep. 2026

These timber floor structures negate the need for downstand beams (which project below the underside of the floor slab and support it). — New Atlas, 25 Sep. 2026

According to images shared by jeweler Antinori di Sanpietro with Tatler, the underside of the setting shows a geometric motif inspired by the Piazza del Campidoglio in Rome. — Bailey Bujnosek, InStyle, 20 Sep. 2026

Cook for 6 minutes, undisturbed, or until browned on the undersides and beginning to firm, then flip with a spatula. — ABC News, 19 Sep. 2026