Abortion is a synonym of Pregnancy. Pregnancy is related to Stretch. Stretch is related to Grow. Swell is a type of Grow. 
Rim is a synonym of Lip. Lip is related to Border. Border is a synonym of March. March is a synonym of Frontier. 
Abortion <--Synonym--> Pregnancy <--RelatedTo--> Stretch <--RelatedTo--> Grow <--IsA-- Swell 
Rim <--Synonym--> Lip <--RelatedTo--> Border <--Synonym--> March <--Synonym--> Frontier 