Modifiers matching vegetation:

• round,
• permanent,
• dense,
• natural,
• desirable,
• sensitive,
• terrestrial,
• deciduous,
• tall,
• larger,
• thick,
• flammable,
• woody,
• homogenous,
• leafy,
• open,
• undesirable,
• coastal,
• actual,
• thin,
• unique,
• unusual,
• native,
• higher,
• rough,
• mixed,
• valuable,
• low,
• strong,
• long,
• tropical,
• surrounding,
• aquatic,
• dead,
• combustible,
• heavy,
• seasoned,
• healthy,
• succulent,
• tender,
• unwanted,
• artificial,
• upland,
• old,
• marginal,

Simple categories matching undesirable:

• activity,
• artifact,
• behavior,
• layer,
• character,
• zone,
• flaw,
• content,
• practice,
• pathogen,
• formation,
• emotion,
• substance,
• trait,
• lipid,
• ingredient,
• nutrient,
• waste,
• rodent,
• attribute,
• adduct,
• behaviour,
• bacteria,
• propensity,
• event,
• outcome,
• cause,
• property,
• scene,
• change,
• facility,
• animal,
• elements,
• precipitate,
• material,
• algae,
• contaminant,
• chemical,
• filler,
• weather,
• communication,
• consequence,
• cation,
• constituent,
• motive,
• microbe,
• symptom,
• growth,
• industry,
• odour,
• defect,
• sediment,
• metal,
• matter,
• taste,
• code,
• thought,
• phase,
• occurrence,
• adaptation,
• area,
• website,
• email,
• vermin,
• state,
• flora,
• part,
• use,
• pattern,
• motion,
• incident,
• bird,
• solid,
• light,
• sector,
• stabilizer,
• situation,
• status,
• location,
• sensation,
• metabolite,
• angle,
• lie,
• particle,
• pollutant,
• condition,
• complication,
• mineral,
• trouble,
• feature,
• fluid,
• phenomenon,
• gas,
• passion,
• mail,
• characteristic,
• component,
• software,
• mammal,
• object,
• item,
• microorganism,
• route,
• thing,
• volatile,
• compound,
• product,
• alteration,
• fauna,
• quality,
• bug,
• mutation,
• process,
• experience,
• creature,
• residue,
• noise,
• plant,
• vegetation,
• organism,
• conduct,
• result,
• cell,
• action,
• pest,
• surface,
• reaction,
• agent,
• deposit,