Modifiers matching research:

• scientific,
• fundamental,
• internal,
• medical,
• administrative,
• professional,
• academic,
• experimental,
• animal,
• outside,
• empirical,
• quantitative,
• atmospheric,
• valuable,
• educational,
• current,
• atomic,
• biological,
• written,
• linguistic,
• attitudinal,
• archaeological,
• qualitative,
• original,
• necessary,
• conventional,
• industrial,
• political,
• ecological,
• clinical,
• traditional,
• expensive,
• secondary,
• primary,
• social,
• critical,
• developmental,
• published,
• vital,
• literary,
• historical,
• analytical,
• relevant,
• future,
• sensitive,
• immoral,
• structural,
• technological,
• reputable,
• independent,
• astronomical,
• descriptive,
• basic,
• legal,
• legitimate,
• psychological,
• common,
• theoretical,
• economic,
• evolutionary,
• scholarly,
• immunological,
• taxonomic,
• biomedical,
• objective,
• molecular,
• related,
• mental,
• civilian,

Simple categories matching empirical:

• discipline,
• property,
• procedure,
• science,
• investigation,
• system,
• practice,
• measure,
• grounds,
• evidence,
• work,
• object,
• terms,
• data,
• study,
• function,
• analysis,
• fact,
• field,
• choice,
• domain,
• method,
• content,
• result,
• knowledge,
• test,
• research,
• integrity,
• condition,