Capture is a synonym of Catch. Catch is a synonym of Grab. Grab is a type of Move. 
Step is related to March. March is the opposite of Still. Still is the opposite of Wave. Wave is related to Beach. 
Capture <--Synonym--> Catch <--Synonym--> Grab --IsA--> Move 
Step <--RelatedTo--> March <--Antonym--> Still <--Antonym--> Wave <--RelatedTo--> Beach 