Excited is the opposite of Calm. Calm is a synonym of Mild. Mild is similar to Gentle. 
Environment is related to Desert. Desert is related to Illusion. Freedom is a type of Illusion. Freedom is related to Escape. 
Excited <--Antonym--> Calm <--Synonym--> Mild <--SimilarTo--> Gentle 
Environment <--RelatedTo--> Desert <--RelatedTo--> Illusion <--IsA-- Freedom <--RelatedTo--> Escape 