1) Earnestness 2) Sedateness 3) Serious-mindedness 4) Seriousness 5) Sincerity 6) Solemness 7) Solemnity 1) Sedateness 2) Solemness 3) Solemnity 
• (n.) The quality or state of being staid; seriousness; steadiness; sedateness; regularity; -- the opposite of wildness, or levity.
Staid'ness noun The quality or state of being staid; seriousness; steadiness; sedateness; regularity; -- the opposite of wildness , or levity . « If sometimes he appears too gray, yet a secret gracefulness of youth accompanies his writings, though the staidness and sobriety o...