inroads

As nouns the difference between intrusion and inroads

is that intrusion is intrusion while inroads is .

As nouns the difference between inroads and breakthrough

is that inroads is while breakthrough is (military) an advance through and past enemy lines.

As an adjective breakthrough is

characterized by major progress or overcoming some obstacle.

As nouns the difference between inroads and successes

is that inroads is plural of lang=en while successes is plural of lang=en.

Successess is likely misspelled.

Successess has no English definition.

As a noun inroads

is plural of lang=en.