Danger is related to Bad. Bad is related to Judgment. 
Leaf is a synonym of Thumb. Thumb is related to Nose. Nose is related to Ear. Ear is related to Listener. 
Danger <--RelatedTo--> Bad <--RelatedTo--> Judgment 
Leaf <--Synonym--> Thumb <--RelatedTo--> Nose <--RelatedTo--> Ear <--RelatedTo--> Listener 