imbrication vs overlapping

imbrication and overlapping both are nouns.

Word	Noun	Adjective	Verb	Adverb
imbrication	Yes	No	No	No
overlapping	Yes	No	No	No

As nouns, imbrication and overlapping are synonyms defined as:

imbrication and overlapping: covering with a design in which one element covers a part of another (as with tiles or shingles)

Other synonyms of imbrication include lapping.

imbrication (noun)	overlapping (noun)
covering with a design in which one element covers a part of another (as with tiles or shingles)	covering with a design in which one element covers a part of another (as with tiles or shingles)