What is the meaning of Backward_compatibility?

5-letter words containing

• 5-letter words containing i

• 5-letter words containing f

• 5-letter words containing e

• 5-letter words containing d

• 5-letter words containing i

5-letter words starting with

• 5-letter words starting with b

• 5-letter words starting with e

• 5-letter words starting with e

• 5-letter words starting with e

• 5-letter words starting with n

5-letter words in the middle

• 5-letter words in the middle l

• 5-letter words in the middle i

• 5-letter words in the middle f

• 5-letter words in the middle n

• 5-letter words in the middle c

5-letter words ending with

• 5-letter words ending with s

• 5-letter words ending with e

• 5-letter words ending with e

• 5-letter words ending with r

• 5-letter words ending with t

5-letter words excluding

• 5-letter words excluding c

• 5-letter words excluding s

• 5-letter words excluding r

• 5-letter words excluding t

• 5-letter words excluding i