What is the meaning of Upsilon_particle?

5-letter words containing

• 5-letter words containing r

• 5-letter words containing e

• 5-letter words containing u

• 5-letter words containing o

• 5-letter words containing a

5-letter words starting with

• 5-letter words starting with e

• 5-letter words starting with i

• 5-letter words starting with w

• 5-letter words starting with u

• 5-letter words starting with r

5-letter words in the middle

• 5-letter words in the middle c

• 5-letter words in the middle i

• 5-letter words in the middle t

• 5-letter words in the middle c

• 5-letter words in the middle l

5-letter words ending with

• 5-letter words ending with v

• 5-letter words ending with o

• 5-letter words ending with t

• 5-letter words ending with o

• 5-letter words ending with f

5-letter words excluding

• 5-letter words excluding e

• 5-letter words excluding y

• 5-letter words excluding a

• 5-letter words excluding i

• 5-letter words excluding t