Molecule is related to Sun. Sun is related to Solar. Solar is related to Energy. Energy is related to Lightning. 
Chef is etymologically related to Head. Chef is related to Cake. Cake is related to Soft. Soft is related to Texture. 
Molecule <--RelatedTo--> Sun <--RelatedTo--> Solar <--RelatedTo--> Energy <--RelatedTo--> Lightning 
Head <--EtymologicallyRelatedTo-- Chef <--RelatedTo--> Cake <--RelatedTo--> Soft <--RelatedTo--> Texture 