Crawl is related to Movement. Movement is related to Stop. Stop is related to Street. Street is related to Real. 
Small is the opposite of Full. Full is a synonym of Proper. 
Crawl <--RelatedTo--> Movement <--RelatedTo--> Stop <--RelatedTo--> Street <--RelatedTo--> Real 
Small <--Antonym--> Full <--Synonym--> Proper 