Unscramble Restisms

What is the meaning of word restisms unscrambled?

What 8 letter words can be made from letters R E S T I S M S:

1. mistress - Definition of mistress

Make more words by adding or removing letters

How many 7 letter words can you make from letters R E S T I S M S?

1. missets - Definition of missets

2. misters - Definition of misters

3. resists - Definition of resists

4. sisters - Definition of sisters

5. smiters - Definition of smiters

Which 7 letter words can be made by removing one letter and unscrambling the remaining letters?
1) Removing the letter R and unscrambling estisms
2) Removing the letter E and unscrambling rstisms
3) Removing the letter S and unscrambling retisms
4) Removing the letter T and unscrambling resisms
5) Removing the letter I and unscrambling restsms
6) Removing the letter S and unscrambling restims
7) Removing the letter M and unscrambling restiss
8) Removing the letter S and unscrambling restism

More anagrams containing the letters R E S T I S M S
restissm restmiss tmssrsei msitrsse