reticle vs graticule

reticle and graticule both are nouns.

Word	Noun	Adjective	Verb	Adverb
reticle	Yes	No	No	No
graticule	Yes	No	No	No

As nouns, reticle and graticule are synonyms defined as:

reticle and graticule: a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument

Other synonyms of reticle include reticule.

reticle (noun)	graticule (noun)
a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument	a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument