1. smut fungus any fungus of the order Ustilaginales
  2. rust fungus any of various fungi causing rust disease in plants
  3. felt fungus fungus that frequently encircles twigs and branches of various trees especially citrus trees in southern United States
  4. sac fungus any of various ascomycetous fungi in which the spores are formed in a sac or ascus
  5. shelf fungus a woody fungus that forms shelflike sporophores on tree trunks and wood structures
  6. white fungus a fungus that attacks living fish and tadpoles and spawn causing white fungus disease: a coating of white hyphae on especially peripheral parts (as fins)
  7. tooth fungus a fungus of the family Hydnaceae
  8. flag smut fungus a smut fungus causing a smut in cereals and other grasses that chiefly affects leaves and stems and is characterized chains of sori within the plant tissue that later rupture releasing black masses of spores
  9. smuttiness obscenity in speech or writing
  10. green smut fungus fungus causing green smut in rice
  11. potato fungus fungus causing a disease in potatoes characterized by black scurfy spots on the tubers
  12. Symphalangus used in some classifications for the siamangs
  13. stiffness the physical property of being inflexible and hard to bend
  14. stuffiness the quality of being close and poorly ventilated
  15. club fungus a club-shaped coral fungus
  16. stuffing padding put in mattresses and cushions and upholstered furniture
  17. cup fungus any fungus that is a member of the subclass Discomycetes
  18. true fungus any of numerous fungi of the division Eumycota
  19. smooth-tongued artfully persuasive in speech
  20. smattering a slight or superficial understanding of a subject