What is the meaning of Equivalence_relation?

5-letter words containing

• 5-letter words containing r

• 5-letter words containing o

• 5-letter words containing r

• 5-letter words containing h

• 5-letter words containing e

5-letter words starting with

• 5-letter words starting with v

• 5-letter words starting with e

• 5-letter words starting with b

• 5-letter words starting with l

• 5-letter words starting with t

5-letter words in the middle

• 5-letter words in the middle u

• 5-letter words in the middle t

• 5-letter words in the middle a

• 5-letter words in the middle o

• 5-letter words in the middle e

5-letter words ending with

• 5-letter words ending with c

• 5-letter words ending with e

• 5-letter words ending with l

• 5-letter words ending with t

• 5-letter words ending with d

5-letter words excluding

• 5-letter words excluding r

• 5-letter words excluding n

• 5-letter words excluding n

• 5-letter words excluding k

• 5-letter words excluding f