Synonyms of spread out
disperseWhen something disperses or when you disperse it, it spreads over a wide area.
• Intense currents disperse the sewage.
dissipateWhen something dissipates or when you dissipate it, it becomes less or becomes less strong until it disappears or goes away completely.
• The tension in the room had dissipated.
Thesaurus for spread out from the Collins English Thesaurus