Unlikely is a synonym of Unlike. Unlike is a synonym of Different. Different is a synonym of Various. 
Excellent is related to Grade. Grade is related to Evaluation. Evaluation is a type of Judgment. Judgment is a type of Trait. 
Unlikely <--Synonym--> Unlike <--Synonym--> Different <--Synonym--> Various 
Excellent <--RelatedTo--> Grade <--RelatedTo--> Evaluation --IsA--> Judgment --IsA--> Trait 