The only chord that I know of that has a flatted 9th with no seventh is the major sus4 flat9 chord; for example Csus4b9.

See here: https://en.wikibooks.org/wiki/Music_Theory/Complete_List_of_Chord_Patterns


The fitness trainer asked me, "What kind of a squat are you accustomed to doing?" I said, "Diddly."


64 bit Win 11 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware