What is the meaning of Additive_operation?

5-letter words containing

• 5-letter words containing t

• 5-letter words containing d

• 5-letter words containing b

• 5-letter words containing n

• 5-letter words containing a

5-letter words starting with

• 5-letter words starting with y

• 5-letter words starting with o

• 5-letter words starting with u

• 5-letter words starting with p

• 5-letter words starting with r

5-letter words in the middle

• 5-letter words in the middle i

• 5-letter words in the middle c

• 5-letter words in the middle e

• 5-letter words in the middle e

• 5-letter words in the middle o

5-letter words ending with

• 5-letter words ending with a

• 5-letter words ending with r

• 5-letter words ending with d

• 5-letter words ending with o

• 5-letter words ending with o

5-letter words excluding

• 5-letter words excluding n

• 5-letter words excluding e

• 5-letter words excluding a

• 5-letter words excluding g

• 5-letter words excluding v