What is the meaning of Unit_of_language?

5-letter words containing

• 5-letter words containing a

• 5-letter words containing n

• 5-letter words containing l

• 5-letter words containing p

• 5-letter words containing d

5-letter words starting with

• 5-letter words starting with p

• 5-letter words starting with t

• 5-letter words starting with r

• 5-letter words starting with a

• 5-letter words starting with i

5-letter words in the middle

• 5-letter words in the middle c

• 5-letter words in the middle u

• 5-letter words in the middle m

• 5-letter words in the middle s

• 5-letter words in the middle m

5-letter words ending with

• 5-letter words ending with i

• 5-letter words ending with i

• 5-letter words ending with i

• 5-letter words ending with o

• 5-letter words ending with l

5-letter words excluding

• 5-letter words excluding s

• 5-letter words excluding a

• 5-letter words excluding h

• 5-letter words excluding i

• 5-letter words excluding o