Find Antonyms

ultrathin Antonyms

Opposite of ultrathin

Pinning down the opposite of ultrathin requires matching its exact sense, so the antonyms and opposite words below are paired with a clear adjective definition and ranked by contrast strength.
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• adjective (Context 1)

Having a remarkably small thickness or depth; extremely thin.

Usage Example

"The engineer selected an thick silicon wafer to reduce the overall weight of the mobile device."

Strongest
thick
Strong
bulky
heavy

Similar words to ultrathin

Words similar to ultrathin shift depending on context. Common synonyms include:

wafer-thin
paper-thin
superthin
razor-thin
gossamer
See all synonyms of ultrathin

• Nearby Words

ultrasmooth
ultrasoft
ultrasound
ultrathin
ultraviolence
ultraviolent
ultraviolet

Cite this Entry

Wordmom. (2026). Antonyms for Ultrathin. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/ultrathin
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