more hardworking, most hardworking
No, "hardworking" is not hyphenated.
Hardworking is the correct spelling.
John is very hardworking
A simile.
They are hardworking because they live and die to work.
Hardworking people
he was hardworking because he became the president of the United States
"Hardworking" is one word.
A metaphor
In "To Kill a Mockingbird," Harper Lee compares Miss Caroline's hands to "two small paws." This description emphasizes Miss Caroline's youthfulness and inexperience as a teacher.
It is a simile.