python – Extract only words using regex

I want to extract only words. The word should not contain any number or any special character attached to it, e.g. (64-bit), WebView2, x86_64. Current regex is able to ignore WebView2 and x86_64 but in the case of (64-bit) it’s returning me bit, which I don’t want. I want to exclude it because it contains numbers with -,(,) characters.

I’ve this input data:

Brave
Google Chrome
Microsoft Edge WebView2 Runtime
Robo 3T 1.4.4
WinRAR 7.01 (64-bit)
Python 3.12.3 Core Interpreter (64-bit)

and this regex:

\b[a-zA-Z]+\b

above regex return this result

['Python', 'Core', 'Interpreter', 'bit']

instead of the expected:

['Python', 'Core', 'Interpreter']