Starting is related to Beginning. Beginning is a synonym of Root. Root is part of Hair. Hair is related to Face. 
Obstacle is the opposite of Benefit. Benefit is a synonym of Assistance. Assistance is related to Assist. 
Starting <--RelatedTo--> Beginning <--Synonym--> Root --PartOf--> Hair <--RelatedTo--> Face 
Obstacle <--Antonym--> Benefit <--Synonym--> Assistance <--RelatedTo--> Assist 