Modifiers matching grass:

• tiny,
• unwanted,
• native,
• desirable,
• annual,
• commercial,
• large,
• perennial,
• larger,
• hard,
• sensitive,
• tall,
• familiar,
• tropical,
• herbaceous,
• aromatic,
• exotic,
• woody,
• ornamental,
• dried,
• sized,
• subtropical,
• nonnative,
• wild,
• small,
• nonwoody,
• monocotyledonous,
• artificial,
• weedy,
• thick,
• local,
• weather,
• tolerant,
• invasive,
• underwater,
• out,
• edible,
• domesticated,
• indigenous,
• terrestrial,
• tough,
• susceptible,
• soft,
• natural,
• foreign,
• low,
• smaller,
• domestic,
• short,
• european,
• new,
• common,
• temperate,
• model,
• nutritious,
• dry,
• light,
• decorative,
• agricultural,
• coarse,
• aggressive,
• fine,
• alien,
• favorite,
• useful,
• important,
• related,

Simple categories matching perennial:

• plant,
• herb,
• species,
• river,
• clover,
• seed,
• grass,
• veggie,
• tree,
• planting,
• allergen,
• issue,
• flower,
• vegetable,
• antigen,
• vine,
• legume,
• ornamental,
• bunchgrass,
• wildflower,
• fruit,
• native,
• group,
• pasture,
• pest,
• crop,
• shrub,
• host,
• weed,
• forage,