SIGHTSEEN is a playable word

sightsee Scrabble® Dictionary

verb
sightsaw, sightseen, sightseeing, sightsees
to visit and view places of interest
261 Playable Words can be made from "SIGHTSEEN"
   2-Letter Words (15 found)
   8-Letter Words (3 found)
   9-Letter Words (2 found)