Word Type

Adjective

Adjective

Noun

The word "effective" can be used as adjective, adjective and noun.

Word Relationships

Opposites (Antonyms)

ineffective ineffective

Derived Terms

Effie bioeffective brake mean effective pressure coeffective cost-effective effectivate effective accelerationism effective accelerationist effective altruism effective altruist effective compression effective dose effective energy effective nuclear charge effective radiated power effective stack size effectively effectiveness effectivization effectivize equieffective geoeffective ineffective isoeffective median effective time noneffective subeffective supereffective undereffective uneffective

Context

geometry military

Related Terms

effect effectivity effectual efficacious efficacity efficacy efficiency efficient pseudoeffective

Related Terms

coefficient effect effectivity effectual efficacious efficacity efficacy efficiency efficient inefficiency inefficient negative operative potent powerful pseudoeffective useful

Similar Terms

actual actual competent competent efficacious efficacious efficient existent hard hitting hard-hitting impelling impelling impressive impressive operational operational operative potent powerful rough and ready rough-and-ready stiff strong telling trenchant useful utile

Synonym Network

in effect

Related Topic Clusters

Policy and Legal Clarity Language

Clear wording for terms, policies, and compliance communication.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.