[1] : The Collaborative International Dictionary of English v.0.48

inwardness \in"wardness\, n.
   1. internal or true state; essential nature; as, the
      inwardness of conduct.
      1913 webster

            sense can not arrive to the inwardness
            of things.                            --dr. h. more.
      1913 webster

   2. intimacy; familiarity. obs. --shak.
      1913 webster

   3. heartiness; earnestness.
      1913 webster

            what was wanted was more inwardness, more feeling.
                                                  --m. arnold.
      1913 webster

[2] : WordNet (r) 2.0

inwardness
     n 1: the choicest or most essential or most vital part of some
          idea or experience; "the gist of the prosecutor's
          argument"; "the heart and soul of the republican party";
          "the nub of the story" syn: kernel, substance, core,
           center, essence, gist, heart, heart and soul,
           marrow, meat, nub, pith, sum, nitty-gritty
     2: preoccupation especially with one's attitudes and ethical or
        ideological values; "the sensitiveness of james's
        characters, their seeming inwardness"; "socrates'
        inwardness, integrity, and inquisitiveness" ant: outwardness
     3: the quality or state of being inward or internal; "the
        inwardness of the body's organs" ant: outwardness
     4: preoccupation with what concerns human inner nature
        especially ethical or ideological values; "socrates'
        inwardness, integrity, and inquisitiveness"- h.r.finch
        ant: outwardness
see also:
kernel substance core center essence gist 
heart heart and soul marrow meat nub 
pith sum nitty-gritty outwardness 

[3] : Moby Thesaurus II by Grady Ward, 1.0

21 moby thesaurus words for "inwardness":
   depth, essentiality, experience, familiarity, fundamentality,
   immanence, inbeing, indigenousness, indwelling, inherence,
   innateness, innerness, inness, interiority, internality,
   internalization, intimacy, intrinsicality, introversion,
   nonobjectivity, subjectivity

Inwardness >> I Words
Inwardness, definition of term: Inwardness
inwardness_pag1.html