Maybe you can find something like "Airr" or anything in that case to transcribe your fav podcast, and then you can easily use Migaku to save the sentence and the words you want, pretty fast. you just need the pod transcribed then use the extension.
Oh, I just got the idea. you might use "utter.io" to live transcribe your podcast and then save whatever parts you like with the browser extension just like any text in the browser. ta-da!!