Expand is the opposite of Shrink. Shrink is a synonym of Diminish. Diminish is a synonym of Decline. 
Condition is a synonym of Accident. Accident is related to Death. Death is related to Tax. Tax is related to Toll. 
Expand <--Antonym--> Shrink <--Synonym--> Diminish <--Synonym--> Decline 
Condition <--Synonym--> Accident <--RelatedTo--> Death <--RelatedTo--> Tax <--RelatedTo--> Toll 