The eight words pictured here, along with their positions, can be divided into two groups of four words apiece. Identify the two groups and why each word-position combination belongs to its group.
I apologize for the sloppiness of the words: they were handwritten by mouse so they'd be in the right positions. They are, top to bottom, SKEPTICAL, DAPPLED, COME-ON, SOLO, SACRAMENT, CACCIATORE, IMPRESSION, and WAITING.
Hint added later:
Overlaying this picture and a particular other picture will help. What sort of picture do you think that might be, based on the layouts of the words?
Hint added even later:
Overlaying this picture and a particular other picture will help. What sort of picture do you think that might be, considering that the words are written either ~horizontally, ~vertically, or crowded into a small square?