What is the meaning of Totally_ordered_set?

5-letter words containing

• 5-letter words containing a

• 5-letter words containing g

• 5-letter words containing n

• 5-letter words containing g

• 5-letter words containing u

5-letter words starting with

• 5-letter words starting with l

• 5-letter words starting with r

• 5-letter words starting with e

• 5-letter words starting with u

• 5-letter words starting with e

5-letter words in the middle

• 5-letter words in the middle v

• 5-letter words in the middle t

• 5-letter words in the middle o

• 5-letter words in the middle e

• 5-letter words in the middle l

5-letter words ending with

• 5-letter words ending with n

• 5-letter words ending with t

• 5-letter words ending with s

• 5-letter words ending with v

• 5-letter words ending with p

5-letter words excluding

• 5-letter words excluding i

• 5-letter words excluding t

• 5-letter words excluding r

• 5-letter words excluding i

• 5-letter words excluding a