What is the meaning of Non-standard?

5-letter words containing

• 5-letter words containing n

• 5-letter words containing u

• 5-letter words containing r

• 5-letter words containing c

• 5-letter words containing p

5-letter words starting with

• 5-letter words starting with n

• 5-letter words starting with i

• 5-letter words starting with e

• 5-letter words starting with e

• 5-letter words starting with c

5-letter words in the middle

• 5-letter words in the middle r

• 5-letter words in the middle i

• 5-letter words in the middle a

• 5-letter words in the middle o

• 5-letter words in the middle s

5-letter words ending with

• 5-letter words ending with e

• 5-letter words ending with i

• 5-letter words ending with o

• 5-letter words ending with e

• 5-letter words ending with t

5-letter words excluding

• 5-letter words excluding n

• 5-letter words excluding r

• 5-letter words excluding t

• 5-letter words excluding i

• 5-letter words excluding o