scintilla vs iota

scintilla and iota both are nouns.

Word	Noun	Adjective	Verb	Adverb
scintilla	Yes	No	No	No
iota	Yes	No	No	No

As nouns, scintilla and iota are synonyms defined as:

Other synonyms of scintilla include shred, smidge, smidgen, smidgeon, smidgin, tittle, whit.

scintilla (noun)	iota (noun)
a sparkling glittering particle	the 9th letter of the Greek alphabet
a tiny or scarcely detectable amount	a tiny or scarcely detectable amount