Area is related to Department. Department is related to Stuff. Stuff is related to Fire. Fire is related to Burning. 
Walk is a synonym of Full. Full is related to Bubble. 
Area <--RelatedTo--> Department <--RelatedTo--> Stuff <--RelatedTo--> Fire <--RelatedTo--> Burning 
Walk <--Synonym--> Full <--RelatedTo--> Bubble 