Fundamental

Basic

Synonyms: Basic, rudimentary, elementary, basal, root, cardinal, original, first, primordial, chief, key, structural, constitutional, intrinsic, vital, important, necessary, pivotal, foundational, elemental, underlying, radical, primary, initial, prime, primitive, principal, capital, central, organic, inherent, ingrained, essential, indispensable, crucial, and critical.

Basics

Synonyms: Basics, rudiments, basic principles, preliminaries, essence, nucleus, base, groundwork, heart of the matter, nuts and bolts, brass tacks, essentials, foundations, first principles, crux, core, heart, bedrock, crux of the matter, sine qua non, nitty-gritty, and ABC.

Example Sentences

Education is the fundamental of knowledge growth.

Trust is fundamental in building strong relationships.

Freedom is fundamental to individual happiness.

Honesty is fundamental in gaining respect.