Under or below?

Can you explain the difference between: under-below-beneath-underneath and up-on-over-upon? Thank you. Alberto

This is a complicated question! In a basic context “under, below, beneath and underneath”  are almost interchangeable. For example, in answering the question “Where’s my suitcase?” you could answer with any of the four (“It’s under/below//beneath/underneath the table).
It would be more complicated if the suitcase was in different position. It could be “on the table” or even “on top of the table” but never “up” or “over” the table. Click here for more deatiled info.