bend vs convolve

bend is a noun but convolve is not a noun.

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

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

Other hyponyms of bend include dent, indent, incurvate, gnarl, crank, convolute.

bend (noun)	convolve (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)	convolve (verb)
cause (an object) to assume a crooked or angular form	curl, wind, or twist together
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