1) Contrast 2) Difference 3) Disparateness 4) Disparity 5) Dissemblance 6) Dissimilitude 7) Difference 8) Heterology 9) Nonuniformity 10) Unlikeness 11) Unsimilarity 1) Creativeness 2) Difference 3) Differentiation 4) Discrepancy 5) Disparity 6) Dissemblance 7) Dissimilaritude 8) Distinction 9) Divergence 10) Diversity 11) Novelty 12) Oogamy 13) Originality 14) Unlikeness 15) Unsimilarity 16) Variation 
• (n.) Want of resemblance; unlikeness; dissimilitude; variety; as, the dissimilarity of human faces and forms.
(from the article `Eckhart, Meister`) 1. Dissimilarity: `All creatures are pure nothingness. I do not say they are small or petty: they are pure nothingness.` Whereas God inherently ...
Dis·sim`i·lar'i·ty noun Want of resemblance; unlikeness; dissimilitude; variety; as, the dissimilarity of human faces and forms. Sir W. Jones. 
[n] - the quality of being dissimilar
dissimilarity 1. The fact, or state, of being different in one or more respects. 2. A point of difference or distinction.
unsimilarity noun the quality of being dissimilar
Difference, unlikeness, heterogeneity. -- C.A.B.
unlikeness; difference. · a point of difference: There are dissimilarities in our outlooks.