A clear case of homonymy 1: The word down in sentence (1-a) and
the word down in sentence (1-b). These are two words that happen to
share sound and spelling. There is no relation between them:
(1) a. Sarah climbed down the ladder.
b. Sarah bought a down blanket.
2. A clear case of homonymy 2: The word bark in sentence (2-a) and
the word Bark in sentence (2-b).
(2) a. My dog would always bark at mailmen.
b. The tree’s bark was a rusty brown.