Shelf is etymologically related to Shell. you are likely to find Mouse in/at/on Shelf. 
Fit is related to Feel. Crawl is a type of Feel. Crawl is related to Speed. Speed is a synonym of Bucket. 
Shell <--EtymologicallyRelatedTo-- Shelf <--AtLocation-- Mouse 
Fit <--RelatedTo--> Feel <--IsA-- Crawl <--RelatedTo--> Speed <--Synonym--> Bucket 