Sigh is related to Sad. Sad is related to Alone. 
Tender is related to Soft. Soft is related to Wood. Wood is related to Structure. Structure is related to Construction. 
Sigh <--RelatedTo--> Sad <--RelatedTo--> Alone 
Tender <--RelatedTo--> Soft <--RelatedTo--> Wood <--RelatedTo--> Structure <--RelatedTo--> Construction 