What is the meaning of Totally_ordered_set?

5-letter words containing

• 5-letter words containing o

• 5-letter words containing m

• 5-letter words containing d

• 5-letter words containing a

• 5-letter words containing r

5-letter words starting with

• 5-letter words starting with l

• 5-letter words starting with s

• 5-letter words starting with n

• 5-letter words starting with r

• 5-letter words starting with e

5-letter words in the middle

• 5-letter words in the middle e

• 5-letter words in the middle v

• 5-letter words in the middle c

• 5-letter words in the middle k

• 5-letter words in the middle d

5-letter words ending with

• 5-letter words ending with v

• 5-letter words ending with h

• 5-letter words ending with i

• 5-letter words ending with m

• 5-letter words ending with s

5-letter words excluding

• 5-letter words excluding i

• 5-letter words excluding r

• 5-letter words excluding m

• 5-letter words excluding g

• 5-letter words excluding a