Accept is a synonym of Swallow. Swallow is related to Action. Action is related to Stretch. Stretch is related to Expand. 
Inevitable is the opposite of Impossible. Impossible is related to Cruise. Cruise is related to Missile. 
Accept <--Synonym--> Swallow <--RelatedTo--> Action <--RelatedTo--> Stretch <--RelatedTo--> Expand 
Inevitable <--Antonym--> Impossible <--RelatedTo--> Cruise <--RelatedTo--> Missile 