Large is similar to Significant. Significant is a synonym of Critical. 
Bell is related to Output. Output is related to Heat. Heat is related to Extreme. Extreme is a synonym of Severe. 
Large <--SimilarTo--> Significant <--Synonym--> Critical 
Bell <--RelatedTo--> Output <--RelatedTo--> Heat <--RelatedTo--> Extreme <--Synonym--> Severe 