Modifiers matching mission:

• overseas,
• military,
• civil,
• key,
• foreign,
• fundamental,
• naval,
• sensitive,
• valuable,
• traditional,
• supporting,
• secondary,
• important,
• dangerous,
• diverse,
• expensive,
• side,
• essential,
• future,
• organizational,
• vital,
• domestic,
• academic,
• distinct,
• specialized,
• educational,
• underwater,
• difficult,
• operational,
• complex,
• religious,
• cultural,
• special,
• related,
• central,
• major,
• unique,
• internal,
• functional,
• primary,
• basic,
• cooperative,
• humanitarian,
• social,
• out,
• routine,
• level,
• civilian,
• exciting,
• national,
• additional,
• common,
• external,
• regular,

Simple categories matching underwater:

• system,
• happening,
• structure,
• object,
• world,
• creature,
• duty,
• surface,
• instrumentation,
• formation,
• experience,
• disturbance,
• metal,
• worker,
• construction,
• event,
• resource,
• activity,
• heritage,
• prey,
• mission,
• location,
• organism,
• shock,
• cave,
• vehicle,
• substance,
• appendage,
• predator,
• vessel,
• animal,
• feature,
• connection,
• native,
• artifact,
• grass,
• munition,
• cetacean,
• task,
• missile,
• weapon,
• service,
• ordnance,
• craft,
• prop,
• sport,
• installation,
• gear,
• weaponry,
• explosive,
• killer,
• mammal,
• shape,
• equipment,
• means,
• operations,
• inhabitant,
• substrate,
• area,
• plant,
• material,
• obstruction,
• body,
• work,
• facility,
• function,
• job,
• mound,
• article,
• operation,
• life,
• projection,
• part,
• unit,
• use,
• information,
• wonder,