planetoid

As nouns the difference between planets and planetoid

is that planets is while planetoid is planetoid.

is likely misspelled.

has no English definition.

As a noun planetoid

is an asteroid of any size.

As nouns the difference between protoplanet and planetoid

is that protoplanet is an astronomical object, approximately the size of the Moon, formed from the mutual gravitational attraction of planetesimals; they are thought to collide with each other and slowly form planets while planetoid is an asteroid of any size.

Dwarfplanet is likely misspelled.

Dwarfplanet has no English definition.

As a noun planetoid

is an asteroid of any size.

Planetoid is a see also of superplanet.

As nouns the difference between planetoid and superplanet

is that planetoid is planetoid while superplanet is any very large planet, but especially a large superjovian gas giant.