Noun	Adjective
allergy He has an allergy to certain types of food.	allergic He is allergic to dust.
carcinogen An example of a carcinogen is X-ray radiation.	carcinogenic Some high blood pressure drugs contain carcinogenic substances.
cosmos The cosmos is vast.	cosmic We are all exposed to cosmic radiation.
energy She is full of energy.	energetic She is so energetic!
fantasy His story is pure fantasy.	fantastic Her idea is fantastic!
lethargy He is suffering from lethargy.	lethargic He was feeling lethargic.
majesty I am awed by the majesty of nature.	majestic Nature is truly majestic.
metal Elements can be classified as metals and non-metals.	metallic The car has a metallic paint.
sympathy The leader has no sympathy for his followers.	sympathetic They had a sympathetic leader.
tragedy "Romeo and Juliet" is a tragedy.	tragic "Romeo and Juliet" has a tragic ending.