Modifiers matching giant:

• marine,
• local,
• flying,
• armored,
• jurassic,
• past,
• extinct,
• commercial,
• prehistoric,
• migratory,
• industrial,
• corporate,
• transnational,
• respected,

Simple categories matching respected:

• professor,
• educator,
• institution,
• expert,
• entity,
• organization,
• organisation,
• establishment,
• agency,
• giant,
• scientist,
• body,
• publication,
• professional,