Antonyms of noun insincerity

1 sense of insincerity

Sense 1
insincerity, falseness, hollowness -- (the quality of not being open or truthful; deceitful or hypocritical)
       Antonym of sincerity (Sense 2)
      => sincerity -- (the quality of being open and truthful; not deceitful or hypocritical; "his sincerity inspired belief"; "they demanded some proof of my sincerity")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun insincerity

1 sense of insincerity

Sense 1
insincerity, falseness, hollowness -- (the quality of not being open or truthful; deceitful or hypocritical)
       => untruthfulness -- (the quality of being untruthful)