There are 15 words that start with 'outsa'.
outsat | outsaw | outsay |
outsaid | outsail | outsang |
outsays | outsails | outsavor |
outsailed | outsavors | outsaying |
outsailing | outsavored | outsavoring |
Note: These 15 words that start with 'outsa' are found from the USA & Canada version of the tournament Scrabble word list.