There are 5 4-letter words that start with 'bus'.
bush | busk | buss | bust | busy |
Note: These 5 4-letter words that start with 'bus' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with bush, bust, busi, busk, busy, busb, buss, buse, busg, busl, busm, busu.
4-letter words start with 'bus' (5)