Umbonal is a 7 letter English word. It's valid Scrabble word worth 11 points. It's valid Words with friends word worth 16 points.
You can make 159 anagrams from letters in umbonal (ablmnou).
1850-55; Latin umbōn- (stem of umbō; see umbo) + -al1
Its shell is considerably twisted just below the umbonal region, while its whole surface is densely striated.
Ligament wanting; shell gaping, with a styloid apophysis in the umbonal cavities.