original vs groundbreaking

original and groundbreaking both are nouns.

Word	Noun	Adjective	Verb	Adverb
original	Yes	Yes	No	No
groundbreaking	Yes	Yes	No	No

original (noun)	groundbreaking (noun)
an original creation (i.e., an audio recording) from which copies can be made	the ceremonial breaking of the ground to formally begin a construction project
something that serves as a model or a basis for making copies

original (adjective)	groundbreaking (adjective)
being or productive of something fresh and unusual; or being as first made or thought of	being or producing something like nothing done or experienced or created before
(of e.g. information) not secondhand or by way of something intermediary
not derived or copied or translated from something else
preceding all others in time or being as first made or performed