Paint is related to Artificial. Artificial is the opposite of Real. Real is a synonym of Actual. Actual is similar to Effective. 
Spark is a synonym of Inspiration. Inspiration is a synonym of Flash. 
Paint <--RelatedTo--> Artificial <--Antonym--> Real <--Synonym--> Actual <--SimilarTo--> Effective 
Spark <--Synonym--> Inspiration <--Synonym--> Flash 