compound noun versus direct address

If I said the following words, "I will watch a movie today only if I take care of the dust devil."

How can the listener know that I am saying "dust devil" versus addressing the pronoun "devil"?

If there was no pause between dust and devil I assume that I am not addressing the pronoun of the word "devil".

Another example, "I will go to college only if I do chemistry devil." In this case, because the speaker was not looking at the sky nor having a pause before the word "devil", "chemistry devil" becomes the compound noun.