TIDELINE is a playable word

tideline Scrabble® Dictionary

noun
pl. tidelines
a line on a shore marking the highest point of the tide
104 Playable Words can be made from "TIDELINE"
   2-Letter Words (12 found)
   3-Letter Words (28 found)
   6-Letter Words (6 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)