NY Times Crossword
November 25, 2018
Joon Pahk
(Title shown below)

The following words can be changed in a certain way that makes them unusual. Can you determine what it is?

BORN
PROS
BELL
CAST
LAPS
COPS

HINT: A single letter makes the change.

Answer:

A final E can be added to each word to get a new word with no change in pronunciation:

BORN - BORNE
PROS - PROSE
BELL - BELLE
CAST - CASTE
LAPS - LAPSE
COPS - COPSE

Puzzle title: SILENT FINALES (FINAL E'S)