I found this helpful when working with various module providers. But why the hell would anyone call SS ‘SYNC’?
SCLK : SCK, CLK.
MOSI : SIMO, SDO, DO, DOUT, SO, MTSR.
MISO : SOMI, SDI, DI, DIN, SI, MRST.
SS : nCS, CS, CSB, CSN, nSS, STE, SYNC, S̅S̅, SSEL, C̅S̅, CE, /SS, SS#
Note that some Chinese providers also name SS ‘SDA’, which is kind of confusing especially when there are also I2C interfaces nearby…