Expand is a synonym of Increase. Increase is related to Big. Big is related to Crop. 
Excited is similar to Crazy. Crazy is similar to Strange. Strange is a synonym of Weird. 
Expand <--Synonym--> Increase <--RelatedTo--> Big <--RelatedTo--> Crop 
Excited <--SimilarTo--> Crazy <--SimilarTo--> Strange <--Synonym--> Weird 