Gear is a type of Adapt. Adapt is a synonym of Accommodate. Accommodate is a type of Provide. 
Level is a type of Tool. Fork is a type of Tool. Fork is the opposite of Knife. 
Gear --IsA--> Adapt <--Synonym--> Accommodate --IsA--> Provide 
Level --IsA--> Tool <--IsA-- Fork <--Antonym--> Knife 