"the pond was too small for sailing"
"a car pool"
"a secretarial pool"
"when he was first hired he was assigned to the pool"
"everyone contributed to the pool"
"there were puddles of muddy water in the road after the rain"
"the body lay in a pool of blood"
"he stood in a pool of light"
"his chair sat in a puddle of books and magazines"
"We pooled resources"