rock – sturdily strong and hard; often confused with stones; person that keeps you grounded to stop you from soaring too high up
~ hard and unforgiving, mother of all stones and pebbles
stone – sharp and jagged; of all shapes and sizes; apparently you can sink like one, too
~ those tiny pieces you bond with while you kick them home
pebble – smooth, rounded stones; dull marbles; weather-worn, beautified rocks; tiny, weak and defenceless
~ for pavement marking and seashore lining
I don’t take geography for a reason.