similitude

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Similarity; resemblance.
• noun Archaic One that closely resembles another.
• noun Archaic A simile, allegory, or parable.

from The Century Dictionary.

• noun Likeness in constitution, qualities, or appearance; similarity; resemblance.
• noun A comparison; a simile; a parable or allegory.
• noun That which bears likeness or resemblance; an image; a counterpart or facsimile.
• noun In geometry, the relation of similar figures to one another.

from the GNU version of the Collaborative International Dictionary of English.

• noun The quality or state of being similar or like; resemblance; likeness; similarity.
• noun The act of likening, or that which likens, one thing to another; fanciful or imaginative comparison; a simile.
• noun That which is like or similar; a representation, semblance, or copy; a facsimile.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun uncountable Similarity or resemblance to something else.
• noun countable A way in which two people or things share similitude.
• noun countable Someone or something that closely resembles another; a duplicate or twin.
• noun A parable or allegory.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun similarity in appearance or character or nature between persons or things
• noun a duplicate copy