The two words in each pair below can be changed into new ones according to a certain pattern. After the changes, the five sets will be related. 

1)

STAT

HABIT

 

2)

SKY

DAY

 

3)

DRY

DIAL

 

4)

IN

URN

 

5)

ARCH

KEY

 

Answers:

 

Both words in each pair can be either preceded or followed by letters which are or become abbreviations of days of the week:

 

1)

STATUE

HABITUE

 

2)

FRISKY

FRIDAY 

 

3)

SUNDRY

SUNDIAL 

 

4) 

SATIN

SATURN

 

5)

MONARCH

MONKEY 

 

Credit:
Brendan Emmett Quigley