The difference between Charm and Spell

Charm as a noun:

An object, act or words believed to have magic power (usually carries a positive connotation).

Charm as a noun:

The ability to persuade, delight or arouse admiration; often constructed in the plural.

Charm as a noun:

A small trinket on a bracelet or chain, etc., traditionally supposed to confer luck upon the wearer.

Charm as a noun (physics):

A quantum number of hadrons determined by the quantity of charm quarks & antiquarks.

Charm as a noun (finance):

A second-order measure of derivative price sensitivity, expressed as the instantaneous rate of change of delta with respect to time.

Charm as a verb:

To seduce, persuade or fascinate someone or something.

Charm as a verb (transitive):

To use a magical charm upon; to subdue, control, or summon by incantation or supernatural influence.

Charm as a verb:

To protect with, or make invulnerable by, spells, charms, or supernatural influences.

Charm as a verb (obsolete, rare):

To make music upon.

Charm as a verb:

To subdue or overcome by some secret power, or by that which gives pleasure; to allay; to soothe.

Charm as a noun:

The mixed sound of many voices, especially of birds or children.

Charm as a noun:

A flock, group (especially of finches).

Spell as a noun:

Words or a formula supposed to have magical powers.

Spell as a noun:

A magical effect or influence induced by an incantation or formula.

Spell as a noun (obsolete):

Speech, discourse.

Spell as a verb:

To put under the influence of a spell; to affect by a spell; to bewitch; to fascinate; to charm.

Spell as a verb (obsolete):

To speak, to declaim.

Spell as a verb (obsolete):

To tell; to relate; to teach.

Spell as a verb (transitive, obsolete):

To read (something) as though letter by letter; to peruse slowly or with effort.

Spell as a verb (transitive, sometimes with “out”):

To write or say the letters that form a word or part of a word.

Spell as a verb (intransitive):

To be able to write or say the letters that form words.

Spell as a verb (transitive):

Of letters: to compose (a word).

Spell as a verb (transitive, figuratively):

To indicate that (some event) will occur.

Spell as a verb (transitive, figuratively, with “out”):

To clarify; to explain in detail.

Spell as a verb:

To constitute; to measure.

Spell as a verb (transitive):

To work in place of (someone).

Spell as a verb (transitive):

To rest (someone or something), to give someone or something a rest or break.

Spell as a verb (intransitive, colloquial):

To rest from work for a time.

Spell as a noun (rare):

A (of work); a set of workers responsible for a specific turn of labour.

Spell as a noun (informal):

A definite (of work or other activity).

Spell as a noun (colloquial):

An indefinite period of time (usually with a qualifier); a relatively short distance.

Spell as a noun:

A period of rest; time off.

Spell as a noun (colloquial, US):

A period of illness, or sudden interval of bad spirits, disease etc.

Spell as a noun (cricket):

An uninterrupted series of alternate overs bowled by a single bowler.

Spell as a noun (dialectal):

A splinter, usually of wood; a spelk.

Spell as a noun:

The wooden bat in the game of trap ball, or knurr and spell.