STACK
Build a tower of words — each floor holds every letter of the floor below, plus one new letter.
6 words · 3→8 letters
Past puzzle — Thursday, September 3, 2026. Streaks and XP are only earned on today's puzzle. Play today's →
Hard
0 days
0:00
(8) Is relevant
(7) Be relevant to
(6) Keep in one's grasp
(5) Line of cars or to teach
(4) Opposing four-letter prefix
(3) Sun's souvenir
How to play STACK
- • Tap a letter tile, then tap a cell to place it — or just type on your keyboard.
- • Build the tower from the bottom up: a 3-letter word at the base, growing one letter per floor to a 8-letter word at the top.
- • Each word must contain every letter of the word below it, plus exactly one new letter. Letters can be rearranged freely.
- • Use only the 8 letters shown above — across the whole tower.
- • When a floor is valid, its letters carry up to the next floor automatically; just add the new letter and rearrange to match the clue.
- • Green = valid containment · Red = a letter is missing or wrong · Solve today's tower to grow your streak and earn XP.
STACK is an original game created by and © Franklin A. Malpass for Planet Earth News Network.