Modifiers matching weeds:

• noxious,
• annual,
• aquatic,
• agronomic,
• harmful,
• broadleaf,
• large,

Simple categories matching broadleaf:

• wood,
• shrub,
• tree,
• evergreen,
• plant,
• forage,
• organism,
• forest,
• species,
• taxon,
• crop,
• weed,
• weeds,