THE TROUBLE WITH TRIPLES I
Credit: GAMES Magazine
February, 1995
Stephen Sniderman  (adapted)

Each word below can be changed into two others by changing a single letter. The changed letter will be in the same position in all three words. For some of the words, more than two other words are possible.

1. CHILL
2. THESE
3. WHILE
4. FOUR
5. FOUL
6. HERE
7. DECIDE
8. DENT
9. CHORDS
10. MAYOR
11. ARISES
12. BUSY
13. SQUIRT
14. CONCEPT
15. DELUXE
16. MONSTER
17. PASTRY
18. TRIES
19. GOOD
20. PRINT
  
 (Possible) Answers:

1. CHILL - CHILD - CHILI 
2. THESE - THEME - THERE
3. WHILE - WHOLE - WHALE
4. FOUR - HOUR - TOUR 
5. FOUL - FOWL - FOIL
6. HERE - HERD - HERO
7. DECIDE - DECODE - DECADE
8. DENT - DEFT - DEBT
9. CHORDS - CHORUS - CHORES
10. MAYOR - MAJOR - MANOR
11. ARISES - IRISES - CRISES
12. BUSY - BURY - BUOY
13. SQUIRT - SQUIRM - SQUIRE
14. CONCEPT - CONCERT - CONCEIT
15. DELUXE - DELUDE - DELUGE
16. MONSTER - MOBSTER - MOISTER
17. PASTRY - PALTRY - PANTRY
18. TRIES - TRIPS - TRIOS
19. GOOD - GOAD - GOLD 
20. PRINT - POINT - PAINT