Pale is related to Blood. Blood is related to Liver. 
Swell is related to Ocean. Ocean is related to Tide. Tide is related to Rhythm. Rhythm is a synonym of Meter. 
Pale <--RelatedTo--> Blood <--RelatedTo--> Liver 
Swell <--RelatedTo--> Ocean <--RelatedTo--> Tide <--RelatedTo--> Rhythm <--Synonym--> Meter 