What is the meaning of Higher-order_function?

5-letter words containing

• 5-letter words containing e

• 5-letter words containing c

• 5-letter words containing n

• 5-letter words containing l

• 5-letter words containing h

5-letter words starting with

• 5-letter words starting with u

• 5-letter words starting with r

• 5-letter words starting with a

• 5-letter words starting with t

• 5-letter words starting with z

5-letter words in the middle

• 5-letter words in the middle y

• 5-letter words in the middle r

• 5-letter words in the middle c

• 5-letter words in the middle o

• 5-letter words in the middle n

5-letter words ending with

• 5-letter words ending with s

• 5-letter words ending with e

• 5-letter words ending with s

• 5-letter words ending with t

• 5-letter words ending with b

5-letter words excluding

• 5-letter words excluding s

• 5-letter words excluding t

• 5-letter words excluding s

• 5-letter words excluding t

• 5-letter words excluding r