Helmet is related to Football. Football is a synonym of Soccer. Soccer is related to Club. Club is a type of Unite. 
Provide is a type of Support. Support is related to Helpful. Helpful is related to Cooperative. Cooperative is the opposite of Competitive. 
Helmet <--RelatedTo--> Football <--Synonym--> Soccer <--RelatedTo--> Club --IsA--> Unite 
Provide --IsA--> Support <--RelatedTo--> Helpful <--RelatedTo--> Cooperative <--Antonym--> Competitive 