Modifiers matching gum:

• animal,
• synthetic,
• common,
• natural,
• organic,
• soluble,
• commercial,
• thickening,
• herbal,
• edible,

Simple categories matching thickening:

• starch,
• material,
• starches,
• mixture,
• agent,
• ingredient,
• sauce,
• gum,
• food,