Unscramble Derphisri

What is the meaning of word derphisri unscrambled?

What 9 letter words can be made from letters D E R P H I S R I:

1. ridership - Definition of ridership

Make more words by adding or removing letters

How many 8 letter words can you make from letters D E R P H I S R I?
Which 8 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter D and unscrambling erphisri
2) Removing the letter E and unscrambling drphisri
3) Removing the letter R and unscrambling dephisri
4) Removing the letter P and unscrambling derhisri
5) Removing the letter H and unscrambling derpisri
6) Removing the letter I and unscrambling derphsri
7) Removing the letter S and unscrambling derphiri
8) Removing the letter R and unscrambling derphisi
9) Removing the letter I and unscrambling derphisr

More anagrams containing the letters D E R P H I S R I
derphriis derphrisi rhrpsdiie rprhiidse