Striking is similar to Impressive. Impressive is similar to Effective. Effective is related to Powerful. Powerful is similar to Influential. 
Shade is related to Nice. Nice is related to Gentle. Gentle is the opposite of Tough. 
Striking <--SimilarTo--> Impressive <--SimilarTo--> Effective <--RelatedTo--> Powerful <--SimilarTo--> Influential 
Shade <--RelatedTo--> Nice <--RelatedTo--> Gentle <--Antonym--> Tough 