Yes, cos is in the scrabble dictionary

...and is worth 6 points by itself.

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cos

abbreviation

1. Cosine.

2. Companies.

3. Consul; consulship.

4. Cosine.

5. Counties.

noun

1. See romaine.

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Points

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cos

5

Scrabble

2 Letters

Scrabble® Points

os

2

so

2

3 Letters

Scrabble® Points

cos

5

soc

5

Found 4 words in 0.11929 seconds