Modifiers matching foundation:

• nonprofit,
• large,
• religious,
• spiritual,
• solid,
• big,
• permanent,
• general,
• major,
• powerful,
• philanthropic,
• public,
• international,
• legal,
• foreign,
• compliant,
• common,
• good,
• traditional,
• conceptual,
• resistant,
• musical,
• economic,
• heavier,
• academic,
• light,
• theoretical,
• stable,
• cosmetic,
• larger,
• alternative,
• level,
• educational,
• firm,
• temporary,
• active,
• influential,
• key,
• unyielding,
• overhead,
• benevolent,
• charitable,
• strong,
• essential,
• american,
• important,
• concrete,
• scientific,
• rigid,
• outside,
• mathematical,
• corporate,
• civilian,
• subjective,
• related,
• personal,
• local,
• huge,
• independent,
• coarse,

Simple categories matching unyielding:

• material,
• foundation,
• object,
• body,
• surface,
• area,
• item,
• envelope,
• structure,
• equipment,
• matter,
• fabric,