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

Relatively warm ocean water can melt the underside of these floating shelves. — Kaif Shaikh, Interesting Engineering, 17 Oct. 2026

Storyteller Overland Storyteller also enhances the rear’s role as a storage garage, adding MOLLE-style organizational panels to the underside of the bed. — New Atlas, 15 Oct. 2026

The right temple features a multipurpose rocker and action button on the underside, near the hinge, with an additional button on the top side. — Will Greenwald, PC Magazine, 15 Oct. 2026

Whether that all becomes quick and routine largely depends on dark ceramic tiles covering Starship’s underside. — Sven Bilén, The Conversation, 29 Sep. 2026