As nouns the difference between underside and archivolt
is that underside is the side that is below or underneath, the bottom while archivolt is an ornamental molding or band following the curve on the underside of an arch.
underside
English
Noun
(
en noun)
The side that is below or underneath, the bottom.
Antonyms
* (l)
Anagrams
*
archivolt
English
Noun
(
en noun)
(architecture) An ornamental molding or band following the curve on the underside of an arch.