[1] : WordNet (r) 2.0

unfamiliarity
     n : unusualness as a consequence of not being well known syn: strangeness
         ant: familiarity
see also:
strangeness familiarity 

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

69 moby thesaurus words for "unfamiliarity":
   agnosticism, amateurishness, amateurism, blankmindedness,
   brand-newness, callowness, dewiness, disaccustomedness,
   empty-headedness, freshness, gloss of novelty, greenhornism,
   greenness, hiatus of learning, ignorance, ignorantism,
   ignorantness, immaturity, inanity, inexperience, innocence,
   intactness, know-nothingism, knowledge-gap, lack of information,
   lateness, maidenhood, mint condition, nescience, newbornness,
   newfangledness, newfangleness, newness, newness to, novelness,
   novelty, nowness, obscurantism, originality, presentness,
   pristineness, rawness, recency, recentness, simpleness, simplicity,
   strangeness, tabula rasa, unaccustomedness, unacquaintance,
   unacquaintedness, unawareness, uncommonness, unconversance,
   unexperiencedness, unfledgedness, unhabituatedness, unintelligence,
   unknowing, unknowingness, unpracticedness, unprofessionalism,
   unprofessionalness, unripeness, unusualness, unwontedness, vacuity,
   vacuousness, virginity

Unfamiliarity >> U Words
Unfamiliarity, definition of term: Unfamiliarity
unfamiliarity_pag1.html