The following words can be changed to new ones according to a certain pattern. What is the pattern and what are the new words?

Park

Plum

Mania

Bear

Cod

Of

Son

Bus

Tax  

 

Answer: 

 

Each word can be changed to a new one by adding the successive letters of the alphabet at the end of the word:

 

Parka

Plumb

Maniac

Beard

Code

Off

Song

Bush

Taxi 

 

Credit:
Braingle