Fantasy is related to Dream. Dream is related to Random. 
Need is the opposite of Sufficient. Sufficient is similar to Comfortable. Comfortable is derived from Comfort. Comfort is related to Ease. 
Fantasy <--RelatedTo--> Dream <--RelatedTo--> Random 
Need <--Antonym--> Sufficient <--SimilarTo--> Comfortable --DerivedFrom--> Comfort <--RelatedTo--> Ease 