Unscramble Irphreids

What is the meaning of word irphreids unscrambled?

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

1. ridership - Definition of ridership

Make more words by adding or removing letters

How many 8 letter words can you make from letters I R P H R E I D S?
Which 8 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter I and unscrambling rphreids
2) Removing the letter R and unscrambling iphreids
3) Removing the letter P and unscrambling irhreids
4) Removing the letter H and unscrambling irpreids
5) Removing the letter R and unscrambling irpheids
6) Removing the letter E and unscrambling irphrids
7) Removing the letter I and unscrambling irphreds
8) Removing the letter D and unscrambling irphreis
9) Removing the letter S and unscrambling irphreid

More anagrams containing the letters I R P H R E I D S
irphreisd irphresdi prsreidhi eirdsphri