Difference between Suck Up and Kotow

SUCK UP vs KOTOW: NOUN

Alternative spelling of kowtow.
The prostration made by mandarins and others to their superiors, either as homage or worship, by knocking the forehead on the ground; a kowtow. There are degrees in the rite, the highest being expressed by three knockings.
A knocking of the forehead on the ground while kneeling, as an act of homage, reverence, worship, respect, etc.
A former Chinese custom of touching the ground with the forehead as a sign of respect or submission

To adulate or flatter somebody excessively, generally to obtain some personal benefit or favour.
To absorb fluid
Try to gain favor by cringing or flattering
Ingratiate oneself to; often with insincere behavior
Take in, also metaphorically

To knock the forehead on the ground while kneeling, as an act of reverence, worship, apology, etc.; perform the kotow; hence, to fawn or be obsequious; cringe.

Play up, Bootlick, Cotton up, Sop up, Shine up, Take up, Fawn, Soak up, Toady, Imbibe, Draw, Kowtow, Truckle, Absorb, Suck

Kotowed, Come, Came, Lady, Perform, Performed, Truckle, Toady, Suck up, Kowtow, Fawn, Bootlick

Sycophant, Toadyism, Adulator, Footlicker, Arse licker, Brownnose, Sop up, Take up, Fawn, Soak up, Toady, Imbibe, Draw, Kowtow, Suck

Moored suck up to is also again called unwritten business.
So I just have to suck up the regular way.
Typically, they suck up machine memory that legitimate programmes use.
Do Anteaters Use Their Long Noses to Suck up Ants?
Almost like a dry sponge to suck up new information.
Comcast suck up NBC would be a worst disaster.
Go suck up to your greedy Emirates buddies.
As it reduces subsidies for gasoline at home all the pent up demand will suck up more crude and more products.
VCE system favouring students who suck up to them setting them up for positions as the dux.
If the Mako Reactor continues to suck up the energy, this fountain will dry up too.