roll vs curl

roll and curl both are nouns.

Word	Noun	Adjective	Verb	Adverb
roll	Yes	No	Yes	No
curl	Yes	No	Yes	No

As nouns, roll and curl are synonyms defined as:

roll and curl: a round shape formed by a series of concentric circles (as formed by leaves or flower petals)

Other synonyms of roll include coil, curlicue, gyre, ringlet, scroll, whorl.

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

Other hyponyms of roll include spool, reel, ball, clew, clue, coil, loop.

roll (noun)	curl (noun)
a flight maneuver; aircraft rotates about its longitudinal axis without changing direction or losing altitude	lock of hair in the shape of a spiral or curl
the act of rolling something (as the ball in bowling)	a round shape formed by a series of concentric circles (as formed by leaves or flower petals)
the act of throwing dice
walking with a swaying gait
anything rolled up in cylindrical form
photographic film rolled up inside a container to protect it from light
a list of names
a document that can be rolled up (as for storage)
a deep prolonged sound (as of thunder or large bells)
a long heavy sea wave as it advances towards the shore
rotary motion of an object around its own axis
the sound of a drum (especially a snare drum) beaten rapidly and continuously
small rounded bread either plain or sweet
a roll of currency notes (often taken as the resources of a person or business etc.)
a round shape formed by a series of concentric circles (as formed by leaves or flower petals)

roll (verb)	curl (verb)
execute a roll, in tumbling	form a curl, curve, or kink
take the shape of a roll or cylinder	play the Scottish game of curling
show certain properties when being rolled	twist or roll into coils or ringlets
boil vigorously	wind around something in coils or loops
shape by rolling	shape one's body into a curl
pronounce with a roll, of the phoneme /r/
arrange or coil around
begin operating or running
flatten or spread with a roller
move by turning over or rotating
move along on or as if on wheels or a wheeled vehicle
move about aimlessly or without any destination, often in search of food or employment
move in a wavy pattern or with a rising and falling motion
cause to move by turning over or in a circular manner of as if on an axis
move, rock, or sway from side to side
emit, produce, or utter with a deep prolonged reverberating sound
sell something to or obtain something from by energetic and especially underhanded activity
occur in soft rounded shapes