Fissure vs Rupture - What's the difference?

As nouns the difference between fissure and rupture

is that fissure is a crack or opening, as in a rock while rupture is a burst, split, or break.

is that fissure is to split forming fissures while rupture is to burst, break through, or split, as under pressure.

(en noun)

a crack or opening, as in a rock

* fissure needle * fissure of Rolando * fissure of Sylvius * fissure vein

(fissur)

To split forming fissures.

* ----

(en noun)

A burst, split, or break.

* Milton

Hatch from the egg, that soon, / Bursting with kindly rupture , forth disclosed / Their callow young.

A social breach or break, between individuals or groups.

* E. Everett

He knew that policy would disincline Napoleon from a rupture with his family.

(medicine) A break or tear in soft tissue, such as a muscle.

(engineering) A failure mode in which a tough ductile material pulls apart rather than cracking.

(ruptur)

(intransitive) To burst, break through, or split, as under pressure.