Answer:
Large is the antonym of thin: I'm large compared to my thin brother, I weigh much more too.
Tall is the antonym of short: My sister is tall compared to my short brother, she is 5 inches taller than him.
and so on..
Model is a synonym of blueorint: My blueprints are missing. If I don't have a model, I won't be able to build the house.
and so on..