Stimulus is related to Shock. Shock is related to Unhappy. Unhappy is related to Sad. Sad is related to Alone. 
Gear is a synonym of Great. Great is related to Danger. Danger is related to Red. Red is part of Spectrum. 
Stimulus <--RelatedTo--> Shock <--RelatedTo--> Unhappy <--RelatedTo--> Sad <--RelatedTo--> Alone 
Gear <--Synonym--> Great <--RelatedTo--> Danger <--RelatedTo--> Red --PartOf--> Spectrum 