What is the meaning of Additive_operation?

5-letter words containing

• 5-letter words containing r

• 5-letter words containing t

• 5-letter words containing a

• 5-letter words containing b

• 5-letter words containing c

5-letter words starting with

• 5-letter words starting with c

• 5-letter words starting with f

• 5-letter words starting with t

• 5-letter words starting with s

• 5-letter words starting with e

5-letter words in the middle

• 5-letter words in the middle i

• 5-letter words in the middle i

• 5-letter words in the middle d

• 5-letter words in the middle s

• 5-letter words in the middle b

5-letter words ending with

• 5-letter words ending with m

• 5-letter words ending with a

• 5-letter words ending with e

• 5-letter words ending with i

• 5-letter words ending with a

5-letter words excluding

• 5-letter words excluding s

• 5-letter words excluding n

• 5-letter words excluding m

• 5-letter words excluding a

• 5-letter words excluding t