Thought is related to Process. Process is related to Grow. Grow is related to Childhood. Childhood is related to Youth. 
Nature is related to Nest. Nest is related to Space. Space is related to Gap. 
Thought <--RelatedTo--> Process <--RelatedTo--> Grow <--RelatedTo--> Childhood <--RelatedTo--> Youth 
Nature <--RelatedTo--> Nest <--RelatedTo--> Space <--RelatedTo--> Gap 