Anagrams of: EIOPRRV

• be shown or be found to be

• establish the validity of something, as by an example, explanation or experiment

• provide evidence for

• prove formally; demonstrate by a mathematical, formal proof

• put to the test, as for its quality, or give experimental use to

• increase in volume

• cause to puff up with a leaven

• take a trial impression of

• obtain probate of

• venomous Old World snakes characterized by hollow venom-conducting fangs in the upper jaw

• A pervert.

• To stare at others in a perverted manner, especially whilst thinking sexual thoughts about them.

• a large natural stream of water (larger than a creek)

• someone who leads a wandering unsettled life

• an adult member of the Boy Scouts movement

• any of various small insectivorous American birds chiefly olive-grey in color

• of or resembling rope (or ropes) in being long and strong

• forming viscous or glutinous threads

• (British informal) very poor in quality

• (cricket) the division of play during which six balls are bowled at the batsman by one player from the other team from the same end of the pitch

• at or to a point across intervening space etc.

• throughout an area

• throughout a period of time

• beyond the top or upper surface or edge; forward from an upright position

• over the entire area

• having come or been brought to a conclusion

• the head of a religious order; in an abbey the prior is next below the abbot

• earlier in time