There are 4 7-letter words that start with 'obs'.
obscene | obscure | obsequy | observe |
Note: These 4 7-letter words that start with 'obs' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with obse, obst, obsc, obso, obsi.
6-letter words start with 'obs' (1)