What is the meaning of Lower_case?

5-letter words containing

• 5-letter words containing r

• 5-letter words containing i

• 5-letter words containing s

• 5-letter words containing l

• 5-letter words containing e

5-letter words starting with

• 5-letter words starting with d

• 5-letter words starting with u

• 5-letter words starting with a

• 5-letter words starting with a

• 5-letter words starting with u

5-letter words in the middle

• 5-letter words in the middle i

• 5-letter words in the middle t

• 5-letter words in the middle c

• 5-letter words in the middle v

• 5-letter words in the middle s

5-letter words ending with

• 5-letter words ending with u

• 5-letter words ending with d

• 5-letter words ending with e

• 5-letter words ending with a

• 5-letter words ending with f

5-letter words excluding

• 5-letter words excluding v

• 5-letter words excluding t

• 5-letter words excluding r

• 5-letter words excluding u

• 5-letter words excluding s