What is the meaning of Closed_set?

5-letter words containing

• 5-letter words containing r

• 5-letter words containing o

• 5-letter words containing i

• 5-letter words containing e

• 5-letter words containing n

5-letter words starting with

• 5-letter words starting with e

• 5-letter words starting with e

• 5-letter words starting with n

• 5-letter words starting with e

• 5-letter words starting with t

5-letter words in the middle

• 5-letter words in the middle o

• 5-letter words in the middle l

• 5-letter words in the middle t

• 5-letter words in the middle g

• 5-letter words in the middle m

5-letter words ending with

• 5-letter words ending with m

• 5-letter words ending with t

• 5-letter words ending with b

• 5-letter words ending with a

• 5-letter words ending with i

5-letter words excluding

• 5-letter words excluding y

• 5-letter words excluding k

• 5-letter words excluding o

• 5-letter words excluding r

• 5-letter words excluding r