sigmatic aorist vs aorist

sigmatic aorist and aorist both are nouns.

Word	Noun	Adjective	Verb	Adverb
sigmatic aorist	Yes	No	No	No
aorist	Yes	No	No	No

As nouns, aorist is a hypernym of sigmatic aorist; that is, aorist is a word with a broader meaning than sigmatic aorist:

sigmatic aorist: an aorist formed by adding sigma or -s to the stem.
aorist: a verb tense in some languages (classical Greek and Sanskrit) expressing action (especially past action) without indicating its completion or continuation

sigmatic aorist (noun)	aorist (noun)
an aorist formed by adding sigma or -s to the stem.	a verb tense in some languages (classical Greek and Sanskrit) expressing action (especially past action) without indicating its completion or continuation