time vs spell

time and spell both are nouns.

Word	Noun	Adjective	Verb	Adverb
time	Yes	No	Yes	No
spell	Yes	No	Yes	No

As nouns, spell is a hyponym of time; that is, spell is a word with a more specific, narrower meaning than time:

time: an indefinite period (usually marked by specific attributes or activities)
spell: a period of indeterminate length (usually short) marked by some action or condition

Other hyponyms of time include day, dead, hard times, incarnation, wee, patch, piece, while, bit, minute, mo, moment, second, ephemera, space age.

time (noun)	spell (noun)
the continuum of experience in which events pass from the future through the present to the past	a verbal formula believed to have magical force
rhythm as given by division into parts of equal duration	a psychological state induced by (or as if induced by) a magical incantation
an instance or single occasion for some event	a time period for working (after which you will be relieved by someone else)
a person's experience on a particular occasion	a period of indeterminate length (usually short) marked by some action or condition
an indefinite period (usually marked by specific attributes or activities)
the period of time a prisoner is imprisoned
a reading of a point in time as given by a clock
the fourth coordinate that is required (along with three spatial dimensions) to specify a physical event
a period of time considered as a resource under your control and sufficient to accomplish something
a suitable moment

time (verb)	spell (verb)
measure the time or duration of an event or action or the person who performs an action in a certain period of time	take turns working
regulate or set the time of	orally recite the letters of or give the spelling of
adjust so that a force is applied and an action occurs at the desired time	indicate or signify
assign a time for an activity or event	place under a spell
set the speed, duration, or execution of	write or name the letters that comprise the conventionally accepted form of (a word or part of a word)
	relieve (someone) from work by taking a turn