1. Something produced by mixing different breeds.
mongrel
“Jenn’s dog was a purebred, but Joe’s was a mongrel; no one knew what kind of dog it was.”

2. “Adults and teens often have disparate tastes in music.”
Distinct or not alike
disparate
“Adults and teens often have disparate tastes in music.”

3. ostracize To exclude or separate from society.
“The bully was ostracized by his classmates for his cruelty.”

4. A riddle or puzzle. conundrum
“Harry had to solve the Sphinx’s conundrum to reach the Goblet of Fire.”

5. Designed to cause fires.
incendiary
“The fires were started by incendiary grenades.”