Founder is a type of Stumble. Founder is a synonym of Collapse. Collapse is a type of Weaken. Weaken is a synonym of Undermine. 
Historic is a synonym of Significant. Significant is related to Mate. Teammate is derived from Mate. 
Stumble <--IsA-- Founder <--Synonym--> Collapse --IsA--> Weaken <--Synonym--> Undermine 
Historic <--Synonym--> Significant <--RelatedTo--> Mate <--DerivedFrom-- Teammate 