speller vs spell

speller and spell both are nouns.

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

speller (noun)	spell (noun)
an introductory textbook to teach spelling	a verbal formula believed to have magical force
someone who spells words	a psychological state induced by (or as if induced by) a magical incantation
	a time period for working (after which you will be relieved by someone else)
	a period of indeterminate length (usually short) marked by some action or condition

speller (verb)	spell (verb)
	take turns working
	orally recite the letters of or give the spelling of
	indicate or signify
	place under a spell
	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