sinning vs original sin

sinning and original sin both are nouns.

Word	Noun	Adjective	Verb	Adverb
sinning	Yes	Yes	No	No
original sin	Yes	No	No	No

As nouns, original sin is a hyponym of sinning; that is, original sin is a word with a more specific, narrower meaning than sinning:

sinning: an act that is regarded by theologians as a transgression of God's will
original sin: a sin said to be inherited by all descendants of Adam

Other hyponyms of sinning include fall, actual sin, deadly sin, mortal sin, venial sin.

sinning (noun)	original sin (noun)
an act that is regarded by theologians as a transgression of God's will	a sin said to be inherited by all descendants of Adam

sinning (adjective)	original sin (adjective)
transgressing a moral or divine law