Hej Skylar, I think yes, you can use these 3 words like synonyms. Just as you can use the questions "Warum", "Weshalb", "Weswegen" as synonyms. With best regards, Hanni

In addition to Hanni's answer: I think, those interrogative pro-adverbs are often used according to the expected answer. For example: 1. Weswegen ärgerst du dich so? (Why are you so angry? (cause)) - Wegen Daniel. (because of Daniel) - Deswegen. (The speaker is pointing to the reason/cause.) 2. Warum machst du das? (Why are you doing that? (purpose)) - Um dich zu ärgern (to make you angry/ to tease you) - Ich will es so, darum mache ich das. - Weil es Spaß macht. (because it's fun) - Darum. (Favourite answer by annoyed people to get rid of people) 3. Wieso kommst du nicht? (motive, reason, cause) - Weil ich keine Zeit habe. 4. Weshalb bist du so gemein? (Why are you so nasty? (reason, cause, inducement)) - Deshalb. (Favourite answer by annoyed people to get rid of people) - Weil du es auch bist. - Du hast mich geärgert. Deshalb bin ich so gemein. "Warum" and "wieso" are used for everything. "Weswegen" is mainly used in cases where you expect a tangible cause, not an explanation. "Weshalb" is used less often. But don't worry too much about it.