Key and Substantive

Key adjective - Coming before all others in importance.

Substantive and key are semantically related in fundamental topic. In some cases you can use "Substantive" instead the word "Key" as an adjective or a noun, when it comes to topics like basic.

Nearby Words: keyed, keyboard, keying

Substantive adjective - Sufficiently large in size, amount, or number to merit attention.

Key and substantive are semantically related in essential topic. Sometimes you can use "Key" instead the word "Substantive" as an adjective or a noun, if it concerns topics such as fundamental, basic.

Nearby Words: substance, substantial, substantially, substantival, substantivized