Yes, mouser is in the scrabble dictionary

...and is worth 10 points by itself.

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Mouser Definition

noun

An animal, especially a cat, that catches mice.
from The American Heritage Dictionary of the English Language, 4th Edition
A catcher of mice and rats.
from Free Scrabble Dictionary
A cat proficient at .
from Free Scrabble Dictionary

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Top Words by points

Points

mouser

8

2 letter words with MOUSER

Points

er

2

oe

2

om

4

or

2

os

2

em

4

re

2

so

2

mu

4

mo

4

me

4

es

2

us

2

um

4

3 letter words with MOUSER

Points

ose

3

ser

3

use

3

ums

5

oes

3

oms

5

ore

3

ors

3

our

3

rem

5

res

3

roe

3

rom

5

rue

3

rum

5

sum

5

sue

3

sou

3

som

5

emo

5

ems

5

emu

5

ers

3

mos

5

mus

5

mor

5

4 letter words with MOUSER

Points

some

6

roue

4

rues

4

rums

6

ruse

4

euro

4

eros

4

emus

6

emos

6

rose

4

sore

4

sour

4

suer

4

sumo

6

sure

4

user

4

roms

6

roes

4

rems

6

meou

6

more

6

muso

6

mors

6

muse

6

moue

6

mure

6

omer

6

ours

4

ores

4

5 letter words with MOUSER

Points

serum

7

muser

7

morse

7

moues

7

mouse

7

mures

7

mores

7

meous

7

omers

7

euros

5

rouse

5

roues

5

6 letter words with MOUSER

Points

mouser

8

Found 82 words in 0.17699 seconds