Acknowledge is a synonym of Confirm. Confirm is a type of Strengthen. Strengthen is a synonym of Nerve. Nerve is related to Transmit. 
Appropriate is a synonym of Borrow. Borrow is related to Rent. 
Acknowledge <--Synonym--> Confirm --IsA--> Strengthen <--Synonym--> Nerve <--RelatedTo--> Transmit 
Appropriate <--Synonym--> Borrow <--RelatedTo--> Rent 