Globalization is the process of opening the economies of the nation for the other nations and to sync the rules and regulations with other nations. It is the connection of economies to the world and allowing trade to take place.
Internationalization on the other hand, means to expand the business and enter into the market of different countries. It is the process in which business, firm or an individual expands and becomes part of the other countries, it may be for goods supply, customer base or such other demand fulfillment.
The similarities between globalization and internationalism is that both allows a certian country access to interact, partner, and connect outside the country itself. Both are the process of opening barriers and allowing the establishment of partnerships to outside countries for the purpose of benifiting and supplying trades and services.