Small is related to Dirt. Dirt is related to Grave. Grave is related to Cemetery. 
Pulse is a synonym of Beat. Beat is related to Hit. Pop is a type of Hit. 
Small <--RelatedTo--> Dirt <--RelatedTo--> Grave <--RelatedTo--> Cemetery 
Pulse <--Synonym--> Beat <--RelatedTo--> Hit <--IsA-- Pop 