No. They are antonyms, or opposites. Rough, and severe are good synonyms for harsh. Soft and gentle are good for mild. These are synonyms.
No. Minor means "smaller", as compared to major which means "bigger". Smaller things may be less important than major things but that does not mean that they have no importance at all, which is the meaning of unimportant.
Yes, they are.
No you cannot. You would have surpassed the requirements of the minor. Besides, the minor should enhance the primary degree.
In a way - the Asia minor is a larger area that include Lydia.
Yes they mean the same thing.
Yes they mean the same thing.
Yes, they can mean the same thing.
No, they are not the same thing. Mean and average are the same thing.
Shabby and different do not mean the same thing.
These two words can mean the same thing.
It can mean the same thing if you use it right:It's a solid source.It's a dependable source.They SOMETIMES can mean the same thing.