6 letter word: P E S S T U

3 letter words
Pet
Pus
Put
Set
Sue
Sup
Ups
Use

4 letter words
Pest
Pets
Psst
Puss
Puts
Sets
Step
Sues
Suet
Sups
Uses

5 letter words
Pests
Setup
Steps
Upset

6 letter words
Setups
Upsets