The difference between Mixed and Mongrel

Mixed is also adjective with the meaning: having two or more separate aspects.

Mongrel is also noun with the meaning: someone or something of mixed kind or uncertain origin.

check bellow for the other definitions of Mixed and Mongrel

Mixed as an adjective:

Having two or more separate aspects.

Examples:

"I get a very mixed feeling from this puzzling painting."
Mixed as an adjective:

Not completely pure, tainted or adulterated.

Examples:

"My joy was somewhat mixed when my partner said she was pregnant: it's a lot of responsibility."
Mixed as an adjective:

Including both male(s) and female(s).

Examples:

"The tennis match was mixed with a boy and a girl on each side."

"My son attends a mixed school, my daughter an all-girl grammar school."
Mixed as an adjective:

Stemming from two or more races or breeds

Examples:

"The benefit dog show has both mixed and single-breed competitions."

"Mixed blood can surprisingly produce inherited properties which neither parent showed"

Mongrel as a noun (often, pejorative):

Someone or something of mixed kind or uncertain origin; especially, a dog that is such.

Examples:

"That dog is a mongrel, who knows what breed it could be!"
Mongrel as a noun (slang, Australia, New Zealand):

A thuggish, obnoxious, or contemptible person; a pitiable person.