I’m sure someone will correct me if I’m wrong but doesn’t a C2 chord consist of the notes C-E-G-D in any order (or inversion), i.e. C-D-E-G, E-D-G-C, etc?

Doesn’t a Csus2 chord consist of the notes C-D-G in any order?

Doesn’t a C9 chord consist of the notes C-E-G-Bb-D in any order?

Isn’t a Cadd9 the same as a C2?

Isn’t a Csus9 the same as a Csus2?

Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware