The phrase "form a cushion" is correct and usable in written English.
It can be used when describing the act of creating a protective or soft barrier, often in a physical or metaphorical sense.
Example: "The pillows on the couch help to form a cushion for anyone who sits down."
Alternatives: "create a buffer" or "establish a padding."
Add some hot water to heat the mash tun and form a cushioning layer on the bottom of the mash tun.
Medium from a well containing 3T3-APCs was aspirated, and the Qtracker mix was added to the coverslip, forming a cushion of liquid resting on the coverslip.
Ventrally the membrane forms a cushioning surface between the occipital condyles of the head and the occipital processes of the propectuses.
Recent studies employing live high-speed imaging using single-plane illumination microscopy revealed that although the endocardial cells form a multicellular cushion structure, these endocardial cells remain epithelial and do not delaminate in the manner described for endocardial cushion cells in the amniote heart.
If the building collapsed, carbon dioxide cartridges could be triggered to inflate the suit to three times its regular size to form a protective cushion between the wearer and material that might fall on him.
Additionally, the endocardium was not observed to form an endocardial cushion in these morphants (Fig. 3D).
Fourth, we performed a histological examination of the 72-hpf embryos and found that, compared to the wild-type, a thinning layer of myocardium with fewer cell numbers in the ventricle was observed in the Nkx2.5/2.7 morphants and that the endocardium of morphants did not form an endocardial cushion (Figs. 3C and 3D).
The uterus, where the fetus is slowly growing, will start to expand and the amniotic sac will fill with fluid, forming a protective cushion around the baby.
Her thick hair was braided into a heavy tress, which formed an excellent cushion for the jar to rest upon; and her complexion was so light that Frank could hardly believe she was not a Spaniard, rather than a native of the islands.
