Unusual is similar to Unique. Unique is a different concept from Ordinary. Ordinary is related to Mill. 
Accelerate is a synonym of Advance. Advance is related to Notice. 
Unusual <--SimilarTo--> Unique <--DistinctFrom--> Ordinary <--RelatedTo--> Mill 
Accelerate <--Synonym--> Advance <--RelatedTo--> Notice 