iota vs small indefinite amount

iota and small indefinite amount both are nouns.

Word	Noun	Adjective	Verb	Adverb
iota	Yes	No	No	No
small indefinite amount	Yes	No	No	No

As nouns, small indefinite amount is a hypernym of iota; that is, small indefinite amount is a word with a broader meaning than iota:

iota: a tiny or scarcely detectable amount
small indefinite amount: an indefinite quantity that is below average size or magnitude

Other hypernyms of iota include small indefinite quantity.

iota (noun)	small indefinite amount (noun)
the 9th letter of the Greek alphabet	an indefinite quantity that is below average size or magnitude
a tiny or scarcely detectable amount