What is the meaning of Binary_operator?

5-letter words containing

• 5-letter words containing e

• 5-letter words containing r

• 5-letter words containing e

• 5-letter words containing e

• 5-letter words containing a

5-letter words starting with

• 5-letter words starting with l

• 5-letter words starting with i

• 5-letter words starting with a

• 5-letter words starting with c

• 5-letter words starting with a

5-letter words in the middle

• 5-letter words in the middle k

• 5-letter words in the middle u

• 5-letter words in the middle u

• 5-letter words in the middle e

• 5-letter words in the middle u

5-letter words ending with

• 5-letter words ending with t

• 5-letter words ending with t

• 5-letter words ending with e

• 5-letter words ending with s

• 5-letter words ending with i

5-letter words excluding

• 5-letter words excluding o

• 5-letter words excluding l

• 5-letter words excluding k

• 5-letter words excluding o

• 5-letter words excluding u