Boulder vs Moulder - What's the difference?

As nouns the difference between boulder and moulder

is that boulder is a large mass of stone detached from the surrounding land while moulder is a person who moulds dough into loaves.

is that boulder is to engage in bouldering while moulder is to decay or rot.

* bowlder, bulder (dated)

(en noun)

A large mass of stone detached from the surrounding land.

(geology) A particle greater than 256 mm in diameter, following the Wentworth scale

* bouldering

(en verb)

To engage in bouldering

(en verb)

To decay or rot.

* Mason

[Time's] gradual touch / Has mouldered into beauty many a tower.

*c.1855': John Brown's body lies a-'''mouldering in the grave, but his soul goes marching on! — Traditional, ''John Brown's Body

* 1841 , Henry Wadsworth Longfellow, "The Rainy Day", Ballads and Other Poems

The day is cold, and dark, and dreary

It rains, and the wind is never weary;

The vine still clings to the mouldering wall,

But at every gust the dead leaves fall,

And the day is dark and dreary.

(en noun)

A person who moulds dough into loaves.

Anyone who moulds or shapes things.

A machine used for moulding.