Protective is similar to Careful. Careful is related to Gentle. Gentle is the opposite of Lady. 
Observe is related to Study. Study is part of House. House is related to Offer. 
Protective <--SimilarTo--> Careful <--RelatedTo--> Gentle <--Antonym--> Lady 
Observe <--RelatedTo--> Study --PartOf--> House <--RelatedTo--> Offer 