iota vs scintilla

iota and scintilla both are nouns.

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

As nouns, iota and scintilla are synonyms defined as:

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

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