Essential and Effective

Essential adjective - Impossible to do without.

Effective and essential are semantically related in practical topic. In some cases you can use "Effective" instead an adjective "Essential".

Nearby Words: essence, essentially, essentiality

Effective adjective - Producing or capable of producing a desired result.

Essential and effective are semantically related in virtual topic. Sometimes you can use "Essential" instead an adjective "Effective", if it concerns topics such as practical.

Nearby Words: effect, effectual, effectiveness, effected, effectively