zig-zag fold vs accordion fold

zig-zag fold and accordion fold both are nouns.

Word	Noun	Adjective	Verb	Adverb
zig-zag fold	Yes	No	No	No
accordion fold	Yes	No	No	No

As nouns, zig-zag fold and accordion fold are synonyms defined as:

zig-zag fold and accordion fold: a continuous parallel folding in an accordion-like fashion, that is with folds alternatively made to the front and back in zig-zag folds.

Other synonyms of zig-zag fold include concertina fold, z-fold.

zig-zag fold (noun)	accordion fold (noun)
a continuous parallel folding in an accordion-like fashion, that is with folds alternatively made to the front and back in zig-zag folds.	a continuous parallel folding in an accordion-like fashion, that is with folds alternatively made to the front and back in zig-zag folds.