1. genus Firmiana small genus of Asian trees or shrubs
  2. Sphenisciformes penguins
  3. genus Rhamnus type genus of the Rhamnaceae: buckthorns
  4. genus Varanus type and sole extant genus of the Varanidae
  5. uniformness the quality of lacking diversity or variation
  6. genus Fremontia flannelbush
  7. genus Oreamnos mountain goats
  8. cantus firmus a melody used as the basis for a polyphonic composition
  9. unsavoriness the property of being extremely unacceptable to the mind
  10. genus Fomes genus of bracket fungi forming corky or woody perennial shelflike sporophores often of large size; includes some that cause destructive heartrot in trees
  11. skinniness the bodily property of lacking flesh
  12. genus Vanessa painted beauty and red admiral
  13. conformance correspondence in form or appearance
  14. genus Formica type genus of the Formicidae
  15. genus Francoa perennial evergreen herbs with white or pink flowers; Chile
  16. genus Fusanus quandong trees
  17. genus Fortunella small genus of shrubs native to south China producing small ovoid fruits resembling oranges: includes kumquats
  18. skin senses the faculty by which external objects or forces are perceived through contact with the body (especially the hands)
  19. Clianthus formosus sprawling shrubby perennial noted for its scarlet black-marked flowers; widely distributed in dry parts of Australia
  20. genus Formicarius type genus of the Formicariidae

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