fold vs pleat

fold and pleat both are nouns.

Word	Noun	Adjective	Verb	Adverb
fold	Yes	No	Yes	No
pleat	Yes	No	Yes	No

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

fold: an angular or rounded shape made by folding
pleat: any of various types of fold formed by doubling fabric back upon itself and then pressing or stitching into shape

Other hyponyms of fold include plait, kink, twirl, twist, pucker, ruck, accordion fold, concertina fold, z-fold, zig-zag fold.

As verbs, pleat is a hyponym of fold; that is, pleat is a word with a more specific, narrower meaning than fold:

fold (noun)	pleat (noun)
the act of folding	any of various types of fold formed by doubling fabric back upon itself and then pressing or stitching into shape
a pen for sheep
a folded part (as in skin or muscle)
a group of people who adhere to a common faith and habitually attend a given church
a group of sheep or goats
a geological process that causes a bend in a stratum of rock
an angular or rounded shape made by folding

fold (verb)	pleat (verb)
incorporate a food ingredient into a mixture by repeatedly turning it over without stirring or beating	pleat or gather into a ruffle
become folded or folded up	fold into pleats
bend or lay so that one part covers the other
confine in a fold, like sheep
cease to operate or cause to cease operating