The word 
is a valid scrabble word
3 short excerpts of WikWik.org (WikWik is an online database of words defined in the English, French, Spanish, Italian, and other Wiktionnaries.)
- umbo n. (Historical) The boss of a shield, at or near the middle and usually projecting, sometimes in a sharp spike.
- umbo n. (Biology) A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane.
- (In French) umbo n.m. (Armement) Pointe, cône, calotte faisant saillie au milieu…
28 valid words from 3 definitions
AND AT BIOLOGY BOSS CALOTTE CONE CORRESPONDING DEPRESSION DISK ELEVATION HISTORICAL IN MEMBRANE MIDDLE MILIEU NEAR OF OR PALATE POINTE PROJECTING ROUNDED SHARP SHIELD SOMETIMES SPIKE THE USUALLY
4 invalid words from 3 definitions
2 words-in-word (Words found as is inside the word.)
2 words-in-word RTL (Words found written from right to left, inside the word.)
One anagram (New word found by changing the order of the letters.)
One cousin (New word found by changing only one letter.)
7 suffixes (New words found by adding one or more letters at the end of the word.)
UMBOS UMBONAL UMBONES UMBONIC UMBONATE UMBONATION UMBONATIONS
36 times in the middle (New words found by adding letters in front and at the end of the word.)
BUMBOS BUMBOY DUMBOS GUMBOS JUMBOS RUMBOS BUMBOAT BUMBOYS GUMBOIL GUMBOOT BUMBOATS GUMBOILS GUMBOOTS GUMBOTIL JUMBOISE JUMBOIZE NELUMBOS PLUMBOUS COLUMBOUS GUMBOTILS JIGGUMBOB JUMBOISED JUMBOISES JUMBOIZED JUMBOIZES ZUMBOORUK JIGGUMBOBS JUMBOISING JUMBOIZING THINGUMBOB ZUMBOORUKS LUMBOSACRAL SUPERJUMBOS THINGUMBOBS PLUMBOSOLVENT PLUMBOSOLVENCY
7 prefixes (New words found by adding one or more letters in front of the word.)
BUMBO DUMBO GUMBO JUMBO RUMBO NELUMBO SUPERJUMBO
9 anagrams plus one (New words formed with all the letters from the word plus a letter.)
+B BUMBO
+D DUMBO
+G GUMBO
+J JUMBO
+K KOMBU
+R RUMBO
+S OMBUS UMBOS
+X BUXOM
3 anagrams minus one (New words formed with all the letters from the word minus a letter.)
Scrabble scoring
- 8 points.
Probability in scrabble (Probability to draw 7 letters at the beginning of the game to build the word.)
- Joker allowed, 1 in 199 chance (0.50%).
- Joker not allowed, 1 in 875 chance (0.11%).
Other languages
- Valid: French
- Invalid: German Spanish Italian Romanian
- (In French) UMBO n.m. Pointe conique faisant saillie au milieu du bouclier.
Categories without words
- No lipograms (Word found when removing only one letter.)
- No epentheses (Word found when adding only one letter.)
Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
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Recommended websites
- Visit WikWik.org - the word
is in the WikWik, see all the details (5 definitions). - www.BestWordList.com to create personalized word lists.
- www.BestWordClub.com to play duplicate online scrabble.
- Ortograf.ws to look for words.
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