Cos·sack 
(kŏsăk)
(kŏsăk)n.
A member of a people of southern European Russia and adjacent parts of Asia. Many Cossacks served as cavalrymen in the armies of the czars.
[Russian kazak and Ukrainian kozak, both from South Turkic qazaq, adventurer; see KAZAKH.]
Cossack′ adj.
- thinkable
- thinkably
- think aloud loud
- think aloud/out loud
- think better of
- think better of
- think big
- thinker
- thinking
- thinking cap
- think little of
- think nothing of
- think out loud
- think piece
- think tank
- think tanker
- think twice
- thinly
- thinner
- thinness
- thinnish
- thin-skinned
- thio-
- thiocarbamide
- thiocyanate