duplicate vs similitude

duplicate and similitude both are nouns.

Word	Noun	Adjective	Verb	Adverb
duplicate	Yes	Yes	Yes	No
similitude	Yes	No	No	No

As nouns, similitude is a hyponym of duplicate; that is, similitude is a word with a more specific, narrower meaning than duplicate:

Other hyponyms of duplicate include backup, computer backup, counterpart, twin, match, mate.

duplicate (noun)	similitude (noun)
a copy that corresponds to an original exactly	a duplicate copy
something additional of the same kind	similarity in appearance or character or nature between persons or things

duplicate (adjective)	similitude (adjective)
being two identical
identically copied from an original

duplicate (verb)	similitude (verb)
increase twofold
make or do or perform again
make a duplicate or duplicates of
duplicate or match