Diminished 7minor 7Dominant 7Major 7Major add 9Major 9 with no fifthC_1 majorC_2 majorC_3 majorC_4 major (explosive)C_5 majorC_6 majorC_7 majorA5 add flat 2A sus2A minorA minor with the third dropped an octaveA MajorA sus4A5 add sharp 4A5 (simple power chord)A5 add flat 6 (spooky)A5 add 6A7 with no third, what are you?A Major 7 with no thirdthe cooler A power chordA5 add flat 9?A5 add 9