Gym is related to Workout. Workout is related to Fit. Fit is related to Glove. Glove is related to Punch. 
Brush is a type of Contact. Contact is a synonym of Striking. 
Gym <--RelatedTo--> Workout <--RelatedTo--> Fit <--RelatedTo--> Glove <--RelatedTo--> Punch 
Brush --IsA--> Contact <--Synonym--> Striking 