Modifiers matching hill:

• small,
• high,
• natural,
• historic,
• scenic,
• gentle,
• steep,
• large,

Simple categories matching gentle:

• cleanser,
• ingredient,
• animal,
• sound,
• hill,
• creature,
• token,
• grain,
• spice,
• therapy,
• fabric,
• modality,
• sedative,
• shampoo,
• herb,