BUG:
In Windows, Ctrl+Backspace erases the word to the LEFT of the caret/text cursor, while Ctrl+Delete erases the word to the RIGHT of the caret.
In Acrobat, if editing a form text field, both shortcuts behave identically, erasing the word to the RIGHT of the caret.

Additionally, in the "Find Text or Tools" box, Ctrl+Backspace does neither action, instead entering an unknown character glyph.

Adobe Acrobat Version 25.1, Windows 10

This isn't an "idea" or a "feature request" it is a BUG REPORT. A cursory web search indicates that cmd+Backspace does the same thing on MacOS, and also is bugged in Adobe software products.