Bomb is a synonym of Turkey. Turkey is a type of Bird. Bird is related to Swallow. Swallow is a synonym of Buy. 
Sustain is a synonym of Establish. Establish is a type of Open. 
Bomb <--Synonym--> Turkey --IsA--> Bird <--RelatedTo--> Swallow <--Synonym--> Buy 
Sustain <--Synonym--> Establish --IsA--> Open 