Invalid and Unretentive

Invalid adjective - Chronically or repeatedly suffering from poor health.

Unretentive and invalid are semantically related In some cases you can use "Unretentive" instead an adjective "Invalid".

Nearby Words: invalidate, invalidated, invalidity, invalided, invalidation

Unretentive adjective - (of memory) deficient in retentiveness or range.

Invalid and unretentive are semantically related in incorrect topic. You can use "Invalid" instead an adjective "Unretentive".