Synonyms: earnestness, serious-mindedness, seriousness, sincerity
Definition: the trait of being serious
Usage: a lack of solemnity is not necessarily a lack of seriousness- Robert Rice
Similar words: trait
Definition: a distinguishing feature of your personal nature
Synonyms: seriousness, distressfulness
Definition: the quality of arousing fear or distress
Usage: he learned the seriousness of his illness
Similar words: badness, severeness, severity
Definition: used of the degree of something undesirable e.g. pain or weather
Synonyms: seriousness, sincerity, earnestness
Definition: an earnest and sincere feeling