There are 7 5-letter words that start with 'cos'.
cosec | coses | coset | cosey | cosie |
costa | costs | |||
Note: These 7 5-letter words that start with 'cos' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with cosm, cost, cosi, cose, cosh, coss, cosp, cosc, cosu, cosy.
4-letter words start with 'cos' (4)