Ignoring spelling, can you make the same change to each of the words below to create new, unrelated words?

SUMMER
PARROT
MISTER
EASEL
GROSSER
CHAIR
TIED
SAVER
STIRRED

HINT:
The change involves the sound of the new words.

Answers:

Each word can be changed to new one by adding the long E sound at the end.

SUMMER - SUMMARY
PARROT - PARITY
MISTER - MYSTERY
EASEL - EASILY
GROSSER - GROCERY
CHAIR - CHERRY
TIED - TIDY
SAVER - SAVORY
STIRRED - STURDY

Credit: Will Shortz
NPR Weekend Edition Sunday Puzzle
March 4, 2010
PUT AN EE ON IT