rain droplets are a kind of water droplets
raindrop is droplet_of_water. rain is water. raindrop is not rainwater. raindrop is not droplet_of_water. water_vapor is not tiny_droplets_of_water. puddle is water. raindrop is drop. raindrop is fresh_water_particle. raindrop is rainwater. water_vapor is tiny_droplets_of_water.