What is the meaning of Improving_agent?

5-letter words containing

• 5-letter words containing a

• 5-letter words containing f

• 5-letter words containing r

• 5-letter words containing u

• 5-letter words containing r

5-letter words starting with

• 5-letter words starting with a

• 5-letter words starting with e

• 5-letter words starting with e

• 5-letter words starting with o

• 5-letter words starting with o

5-letter words in the middle

• 5-letter words in the middle s

• 5-letter words in the middle r

• 5-letter words in the middle r

• 5-letter words in the middle k

• 5-letter words in the middle l

5-letter words ending with

• 5-letter words ending with e

• 5-letter words ending with k

• 5-letter words ending with i

• 5-letter words ending with r

• 5-letter words ending with u

5-letter words excluding

• 5-letter words excluding n

• 5-letter words excluding d

• 5-letter words excluding e

• 5-letter words excluding l

• 5-letter words excluding l