Outlook
/ˈaʊtlʊk/
n. “Your mailbox, calendar, and tasks under one roof.”
Outlook, short for Microsoft Outlook, is a personal information manager and email client that forms the front-end for Microsoft Exchange and other mail servers. It combines email, calendars, contacts, and task management in a single interface, providing users with an organized, efficient way to manage communication and schedules.
Office
/ˈɒfɪs/
n. “Work, standardized.”
Office is a suite of productivity applications developed by Microsoft to handle the everyday mechanics of modern work: writing documents, analyzing data, creating presentations, managing email, and coordinating schedules. It is less a single tool and more a shared grammar for how organizations communicate.