bend vs curve

bend and curve both are nouns.

Word	Noun	Adjective	Verb	Adverb
bend	Yes	No	Yes	No
curve	Yes	No	Yes	No

As nouns, bend and curve are synonyms defined as:

bend and curve: curved segment (of a road or river or railroad track etc.)

As nouns, curve is a hypernym of bend; that is, curve is a word with a broader meaning than bend:

Other hypernyms of bend include curved shape.

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

bend (noun)	curve (noun)
curved segment (of a road or river or railroad track etc.)	a pitch of a baseball that is thrown with spin so that its path curves as it approaches the batter
diagonal line traversing a shield from the upper right corner to the lower left	curved segment (of a road or river or railroad track etc.)
movement that causes the formation of a curve	the property possessed by the curving of a line or surface
an angular or rounded shape made by folding	a line on a graph representing data
a circular segment of a curve	the trace of a point whose direction of motion changes

bend (verb)	curve (verb)
cause (an object) to assume a crooked or angular form	form a curl, curve, or kink
bend a joint	turn sharply; change direction abruptly
form a curve	form an arch or curve
change direction	bend or cause to bend
turn from a straight course, fixed direction, or line of interest	extend in curves and turns
bend one's back forward from the waist on down