Grow is the opposite of Reduce. Reduce is related to Decline. Decline is a synonym of Decrease. 
Opportunity is related to Regret. the first thing you do when you Kill is Regret. Kill is related to Bloody. Bloody is a synonym of Damn. 
Grow <--Antonym--> Reduce <--RelatedTo--> Decline <--Synonym--> Decrease 
Opportunity <--RelatedTo--> Regret <--HasFirstSubevent-- Kill <--RelatedTo--> Bloody <--Synonym--> Damn 