Noun sincerity has 4 senses
  1. earnestness, seriousness, sincerity - an earnest and sincere feeling
    --1 is a kind of gravity, solemnity
  2. sincerity - the quality of being open and truthful; not deceitful or hypocritical; "his sincerity inspired belief"; "they demanded some proof of my sincerity"
    --2 is a kind of
    Antonyms: insincerity, falseness
    --2 has particulars: heartiness, wholeheartedness; singleness, straightforwardness
  3. sincerity, unassumingness - a quality of naturalness and simplicity; "the simple sincerity of folk songs"
    --3 is a kind of naturalness
  4. seriousness, earnestness, serious-mindedness, sincerity - the trait of being serious; "a lack of solemnity is not necessarily a lack of seriousness"- Robert Rice
    --4 is a kind of trait
    --4 has particulars:
     committedness, commitment; graveness, gravity, sobriety, soberness, somberness; sedateness, staidness, solemnity, solemness