roll vs coil

roll and coil both are nouns.

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

As nouns, roll and coil are synonyms defined as:

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

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

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

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

roll (noun)	coil (noun)
a flight maneuver; aircraft rotates about its longitudinal axis without changing direction or losing altitude	a structure consisting of something wound in a continuous series of loops
the act of rolling something (as the ball in bowling)	reactor consisting of a spiral of insulated wire that introduces inductance into a circuit
the act of throwing dice	tubing that is wound in a spiral
walking with a swaying gait	a contraceptive device placed inside a woman's womb
anything rolled up in cylindrical form	a transformer that supplies high voltage to spark plugs in a gasoline engine
photographic film rolled up inside a container to protect it from light	a round shape formed by a series of concentric circles (as formed by leaves or flower petals)
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)	coil (verb)
execute a roll, in tumbling	wind around something in coils or loops
take the shape of a roll or cylinder	make without a potter's wheel
show certain properties when being rolled	to wind or move in a spiral course
boil vigorously
shape by rolling
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