D Dominant 7th (♭5) :: D F♯ A♭ C

F
C
G
D
♭7
D
3
♭5
D
♭5
3
♭7
3
♭5
♭7
D
♭5
D
♭7
3
⬤ ⬤
♭7
D
⬤ ⬤
F Sus 4th :: F B♭ C

F
C
G
D
F
5
4
F
4
F
5
5
4
4
F
5
⬤ ⬤
F
5
⬤ ⬤