Interchange = exchange, replace with each other. Alternate = Eg: 1.2.1.2.1.2.1.2.

Alternate of ( hot man) is sexy man. Interchange of ( hot drink) is tea or coffee ( tea isn't like a coffee, but both are hot drink)

In my understanding, alternate is exactly the same as the option. Interchange is another option it can't be the same as the main option but it could give result.

To alternate is to swap between, usually two, options. ... a b a b a b a b .... <-- alternating sequence of "a" and "b" . Interchange? not so obvious. . These two words are not interchangable. You generally cannot nterchange them and keep the same meaning. . The road suddenly became a massive interchange between to major highways. - an intersection that alolows you to change form one road to another road. . If we take ethylene (C2H4) and interchange the hydrogens for Fluorine we get Tetrafluoroethylene. (C2F4) Swap one for another, once. not continuing.

Lots. Any context?