NY Times Crossword
July 7, 2020
Kevin Patterson

The following words and partial words can be completed in such a way that all four words will have something in common. What are the new words, and how are they related?

LIT
TOI
CAR
TIS

HINTS:
1. Three letters, different in each case, can be added to the clue words to get new, related words.
2. Each of the new words can be followed by the same word.

Answer:

LITMUS
TOILET
CARBON
TISSUE - - - kinds of paper