What are polysemous words and synonyms?

Polysemous words refer to words with two or more meanings. For example:

The meaning of "wide":

① Large horizontal distance: the road is very wide.

Relax: after listening to his words, I am relieved by half.

3 not demanding: leniency.

Abundance: living standards have improved, and hands are much wider than in the past.

Homographs refer to a group of words with the same pronunciation and shape but no connection between meanings. For example:

The meaning of "don't":

Farewell: Farewell to my alma mater.

② Stuck or stuck: No school badge.

No, no: don't go.

The connection between them is that they all contain two or more senses, but the meanings of multiple senses between polysemous words are related, while the meanings of multiple senses between homographs are irrelevant.