Yes, leach is in the scrabble dictionary

...and is worth 11 points by itself.

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Leach Definition

noun

A porous, perforated, or sievelike vessel that holds material to be leached.
from The American Heritage Dictionary of the English Language, 4th Edition
The act or process of leaching.
from The American Heritage Dictionary of the English Language, 4th Edition
The substance through which a liquid is leached.
from The American Heritage Dictionary of the English Language, 4th Edition

verb-intransitive

To be dissolved or passed out by a percolating liquid.
from The American Heritage Dictionary of the English Language, 4th Edition

verb-transitive

To empty; drain: "a world leached of pleasure, voided of meaning” ( Marilynne Robinson).
from The American Heritage Dictionary of the English Language, 4th Edition
To remove soluble or other constituents from by the action of a percolating liquid.
from The American Heritage Dictionary of the English Language, 4th Edition

verb

To dissolve out by the action of a percolating liquid .
from Free Scrabble Dictionary
To subject to the action of percolating liquid (as water) in order to separate the soluble components.
from Free Scrabble Dictionary
To remove (nutritive or harmful elements) from soil by percolation.
from Free Scrabble Dictionary
To draw out or remove as if by percolation .
from Free Scrabble Dictionary
To pass out or through by percolation.
from Free Scrabble Dictionary

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Top Words by points

Points

chela

10

2 letter words with LEACH

Points

ah

5

la

2

he

5

ha

5

el

2

eh

5

al

2

ae

2

3 letter words with LEACH

Points

cel

5

ale

3

lea

3

ace

5

hae

6

lah

6

lac

5

4 letter words with LEACH

Points

hale

7

lech

9

lace

6

heal

7

alec

6

each

9

ache

9

5 letter words with LEACH

Points

chela

10

leach

10

Found 24 words in 0.13441 seconds