The words in Group A share a common property that only one word in Group B satisfies. Which one is it? Group A:
Chains
Countess
Stained
Schooled
Purring
Corny Group B:
Reaction
Penned
Spoiled
Stints
Putting
Hurry

Spoiled The property is that both sets of alternate letters form valid English words.
ChAiNs - can, his
CoUnTeSs - cuts, ones
StAiNeD - sand, tie
ScHoOlEd - shoe, cold
PuRrInG - prig, urn
CoRnY - cry, on So the answer is SpOiLeD - sold, pie Today's brain teaser courtesy of Braingle.com.