The Word to PDF page accepts more than one file per upload and lets the user add further files before starting conversion.
Adobe's own batch conversion guide describes converting a group of files into separate output PDFs in one action, rather than a single merged file. Convert multiple files to PDFs — Batch convert to PDF | Adobe Acrobat
Word To PDFConvert Multiple Word Documents To PDF At Once In One Upload
Upload the first Word document using the file selector.
Add the remaining Word files to the queue before starting the process.
When more than one document finishes converting, the site packages every output PDF into a single PDFTools.zip archive instead of downloading them one by one.
Downloading the Batch Results
Download the PDFTools.zip file from the results screen.
Extract the archive to access the individual PDF files.
Checking the Converted Documents
Open each PDF to review the layout and content.
Compare the page count of each PDF against the original Word document.
Continue with Word to PDF doc vs docx size limit or Word to PDF hyperlinks tracked changes.
Frequently Asked Questions about Convert Multiple Word Documents to PDF at Once
How do I add more files to the batch?
Select the add file button to include additional Word documents in the queue.
Where do I find the finished files?
Download the PDFTools.zip archive from the results area.
How do I check if a file converted correctly?
Open the extracted PDF and review the text and images.
What should I do if a file fails?
Remove the failed file from the queue and upload it again separately.