To "interrupt" means to break a pattern, a course or a plan.
You could say, "I hate to INTERRUPT your dinner plans, but we have to make a necessary change."
To "disrupt" means to throw into confusion or to upset.
You could say, "Their late arrival DISRUPTED the timing of our dinner. I fear the chicken is very overcooked and dry!".
A person who is "confounded" is puzzled or bewildered.
You could say, "The old lady was CONFOUNDED when she received her hotel bill. It was double the amount she had expected".
A person who is "flustered" is agitated and distracted.
You could say, "The old woman didn't know which bus to take to get home. She was FLUSTERED and looked like she was about to cry."
A "deranged" person is insane, mentally unbalanced, even dangerous.
You could say, "Only a DERANGED person would commit such a crime".
The word "disorder" means a lack of good arrangement.
It can be applied to objects or to medical conditions.
You could say, "The kitchen was in a sad state of DISORDER".
"The man suffered from a heart DISORDER."
Hope this helps