What is the meaning of Countable_additivity?

5-letter words containing

• 5-letter words containing l

• 5-letter words containing g

• 5-letter words containing n

• 5-letter words containing s

• 5-letter words containing h

5-letter words starting with

• 5-letter words starting with s

• 5-letter words starting with v

• 5-letter words starting with l

• 5-letter words starting with d

• 5-letter words starting with e

5-letter words in the middle

• 5-letter words in the middle a

• 5-letter words in the middle r

• 5-letter words in the middle e

• 5-letter words in the middle n

• 5-letter words in the middle n

5-letter words ending with

• 5-letter words ending with a

• 5-letter words ending with a

• 5-letter words ending with e

• 5-letter words ending with e

• 5-letter words ending with c

5-letter words excluding

• 5-letter words excluding v

• 5-letter words excluding c

• 5-letter words excluding p

• 5-letter words excluding a

• 5-letter words excluding i