Yes, blob is in the scrabble dictionary

...and is worth 11 points by itself.

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Blob Definition

noun

A daub, as of color.
from The American Heritage Dictionary of the English Language, 4th Edition
A soft, amorphous mass.
from The American Heritage Dictionary of the English Language, 4th Edition
A small drop or lump of something viscid or thick.
from Free Scrabble Dictionary
A daub or spot of color.
from Free Scrabble Dictionary
Something ill-defined or amorphous.
from Free Scrabble Dictionary

verb-transitive

To splash or daub with blobs; splotch.
from The American Heritage Dictionary of the English Language, 4th Edition

verb

To mark with .
from Free Scrabble Dictionary

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Top Words by points

Points

blob

8

2 letter words with BLOB

Points

bo

4

lo

2

3 letter words with BLOB

Points

bob

7

lob

5

4 letter words with BLOB

Points

blob

8

Found 5 words in 0.12731 seconds