The Collaborative International Dictionary of English v.0.48:

Lordliness \Lord"li*ness\, n. [From Lordly.]
   The state or quality of being lordly. --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lordliness
    n 1: formality in bearing and appearance; "he behaved with great
         dignity" [syn: dignity, lordliness, gravitas]
    2: overbearing pride evidenced by a superior manner toward
       inferiors [syn: arrogance, haughtiness, hauteur, high-
       handedness, lordliness]

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "lordliness":
   arbitrariness, augustness, authoritarianism, authoritativeness,
   autocraticalness, bossism, courtliness, dignifiedness, dignity,
   domineering, domineeringness, elitism, grandeur, gravity,
   high-and-mightiness, imperativeness, imperiousness, kingliness,
   loftiness, magisterialness, magistrality, majesty, masterfulness,
   nobility, overbearance, overbearing, overbearingness,
   peremptoriness, pride of bearing, pride of place, princeliness,
   proud bearing, regality, sedateness, sobriety, solemnity,
   stateliness, tyrannicalness, venerability, worthiness