Second-rate and Unknowledgeable

Second-rate adjective - Of average to below average quality.

Unknowledgeable and second-rate are semantically related. In some cases you can use "Unknowledgeable" instead an adjective phrase "Second-rate".

Unknowledgeable adjective - Unaware because of a lack of relevant information or knowledge.

Second-rate and unknowledgeable are semantically related. Sometimes you can use "Second-rate" instead an adjective "Unknowledgeable".