bend vs hunch over

bend is a noun but hunch over is not a noun.

Word	Noun	Adjective	Verb	Adverb
bend	Yes	No	Yes	No
hunch over	No	No	Yes	No

bend (noun)	hunch over (noun)
curved segment (of a road or river or railroad track etc.)
diagonal line traversing a shield from the upper right corner to the lower left
movement that causes the formation of a curve
an angular or rounded shape made by folding
a circular segment of a curve

bend (verb)	hunch over (verb)
cause (an object) to assume a crooked or angular form	round one's back by bending forward and drawing the shoulders forward
bend a joint
form a curve
change direction
turn from a straight course, fixed direction, or line of interest
bend one's back forward from the waist on down