Bunch is a synonym of Nest. Nest is related to Member. Member is related to Participant. 
Break is related to Trauma. Trauma is related to Burn. Grass can Burn. Wheat is a type of Grass. 
Bunch <--Synonym--> Nest <--RelatedTo--> Member <--RelatedTo--> Participant 
Break <--RelatedTo--> Trauma <--RelatedTo--> Burn <--CapableOf-- Grass <--IsA-- Wheat 