1) Assorted 2) Different 3) Diverse 4) Inconcinne 5) Nonequal 6) Opposing 7) Separate 8) Unalike 9) Unconnected 10) Uneven 11) Unlike 1) Contrasting 2) Different 3) Distinct 4) Diverse 5) Incongruent 6) Like chalk and cheese 7) Marked by dissimilarity 8) Not alike 9) Not alike or similar 10) Not similar 11) Poles apart 12) Unalike 13) Unequal 14) Unlike 15) Unrelated 
• (a.) Not similar; unlike; heterogeneous; as, the tempers of men are as dissimilar as their features.
Dis·sim'i·lar adjective [ Prefix dis- + similar : confer French dissimilaire .] Not similar; unlike; heterogeneous; as, the tempers of men are as dissimilar as their features. « This part very dissimilar to any other.» Boyle. 
[adj] - not similar
dissimilar 1. Differing in one or more respects; not alike. 2. Not similar; unlike; different.
adjective not similar; `a group of very dissimilar people`; `a pump not dissimilar to those once found on every farm`; `their understanding of the world is not so dissimilar from our own`; `took different (or dissimilar) approaches to the problem`
not similar; unlike; different.
[SAT terms] not alike