Opportunity is a type of Situation. Situation is a synonym of Condition. 
Cream is related to Silk. Silk is related to Nice. Nice is related to Weather. Weather is related to Day. 
Opportunity --IsA--> Situation <--Synonym--> Condition 
Cream <--RelatedTo--> Silk <--RelatedTo--> Nice <--RelatedTo--> Weather <--RelatedTo--> Day 