What is the meaning of One_or_two?

5-letter words containing

• 5-letter words containing k

• 5-letter words containing l

• 5-letter words containing s

• 5-letter words containing a

• 5-letter words containing f

5-letter words starting with

• 5-letter words starting with n

• 5-letter words starting with n

• 5-letter words starting with t

• 5-letter words starting with l

• 5-letter words starting with i

5-letter words in the middle

• 5-letter words in the middle e

• 5-letter words in the middle n

• 5-letter words in the middle s

• 5-letter words in the middle s

• 5-letter words in the middle r

5-letter words ending with

• 5-letter words ending with n

• 5-letter words ending with t

• 5-letter words ending with l

• 5-letter words ending with a

• 5-letter words ending with o

5-letter words excluding

• 5-letter words excluding n

• 5-letter words excluding c

• 5-letter words excluding r

• 5-letter words excluding o

• 5-letter words excluding e