1. Not arranged in order hierarchically
   - ungraded, unordered

See also: nonhierarchic, nonhierarchical

• yellowish brown
• yellowish green
• yellowish pink
• yellowish-beige
• yellowish-gray
• yellowish-grey
• yellowish-orange
• yellowish-white
• Yellowknife
• yellowlegs
• yellowness
• Yellowstone
• Yellowstone National Park
• Yellowstone River
• yellowtail
• yellowtail flounder
• yellowtail snapper
• yellowthroat
• yellowwood
• yellowwood tree
• yellowy
• yelp
• yelping
• Yemen
• Yemeni