older 32 bit apps will not be supported on Catalina.
With the release of macOS 10.15 Catalina, applications will have to be 64-bit. App developers will issue updated apps if they want their apps to work on this newest macOS upgrade
32-bit app compatibility with macOS High Sierra 10.13 ... - Apple Support
https://support.apple.com/en-us/HT208436
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Office for Mac running macOS Catalina
If you have Office 2011 for Mac or before WILL NOT run.
Office 2016 for Mac needs to be v15.35 or later.
Update the software or try an alternative for word documents—
https://docs.microsoft.com/en-us/officeupdates/update-history-office-for-mac
The current Office for Mac; Office 365 or Office 2019 (One-time purchase) are OK with Catalina
https://support.office.com/en-us/article/how-do-i-upgrade-office-ee68f6cf-422f-464a-82ec-385f65391350
https://products.office.com/en-us/compare-all-microsoft-office-products?&activetab=tab:primaryr1
To activate a Microsoft Office 365 subscription you simply enter the email address you used when you extended the subscription with Microsoft.
or try an alternative for word documents—
Pages.app built into the macOS https://support.apple.com/pages
LibreOffice shareware/ https://www.libreoffice.org/download/download/
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Office 2016, 2019 or 365 will only import data from Outlook 2011 or newer.
If you're using Outlook 2011, you need your email database long enough to import it into Office 2019.