Mechanism is related to Stair. Stair is related to Part. Part is related to Throat. Throat is related to Jaw. 
Freedom is a type of Illusion. Illusion is a synonym of Fantasy. Fantasy is the opposite of Real. 
Mechanism <--RelatedTo--> Stair <--RelatedTo--> Part <--RelatedTo--> Throat <--RelatedTo--> Jaw 
Freedom --IsA--> Illusion <--Synonym--> Fantasy <--Antonym--> Real 