Yes, cogs is a Scrabble word!
...and is worth 7 points in Scrabble, and 9 points in Words with Friends
cogs
Verb
1. Roll steel ingots
2. Join pieces of wood with cogs
Noun
1. A subordinate who performs an important but routine function
2. Tooth on the rim of gear wheel
What Scrabble words can I make with the letters in cogs?
3 Letter Words
2 Letter Words
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Words that can be created with an extra letter added to cogs:
L:clogs