1. What do the following three words have in common?

SALE
DOVE
AUGUST

2. What do the following words have in common

REVOLTING
TAMPERED
FLYSWATTER

Answers:

1.Adding a single letter at the end of each word will give a U.S. state capital:

SALEM
DOVER
AUGUSTA

2. Hidden in each word is word related to electrical power:

reVOLTing
tAMPEREd
flysWATTer

Credit: #2
NY Times Crossword
October 28, 1998
Alan Arbesfeld