Synonyms of fundamental

fundamental 1 of 2

adjective

ˌfən-də-ˈmen-tᵊl 

as in basic

of or relating to the simplest facts or theories of a subject

the purpose of the course is to furnish students with fundamental knowledge of human reproduction

Synonyms & Similar Words

• basic
• rudimentary
• elementary
• introductory
• underlying
• essential
• elemental
• basal
• beginning
• simple
• rudimental
• meat-and-potatoes
• preliminary
• primary
• abecedarian
• primal
• prime
• crucial
• important
• primordial
• key
• primeval
• primitive
• uncomplicated
• preparatory
• crude
• rude

Antonyms & Near Antonyms

• advanced
• complex
• sophisticated
• extensive
• detailed
• complicated
• higher
• intricate
• elaborate
• high
• evolved
• developed
• convoluted
• refined

fundamental

2 of 2

noun

1

as in axiom

Related Words

• axiom
• maxim
• rule
• precept
• regulation
• principle
• code
• law
• statute
• constitution
• value
• act
• directory
• ground rule
• ordinance
• instruction
• direction
• commandment
• reg
• decree
• bylaw
• directive
• decalogue
• restriction
• fiat
• moral
• order
• practice
• command
• tradition
• prohibition
• edict
• dictate
• manners
• formula
• standard
• interdiction
• guide
• guideline
• blueprint
• custom
• ban
• mores
• charge
• behest
• habit
• convention
• practise
• proscription
• way
• canon

2

as in essence

Related Words

• essence
• problem
• core
• main
• issue
• consideration
• basis
• substance
• crux
• essential
• sum
• heart
• burden
• gist
• nucleus
• staple
• body
• bulk
• purpose
• pivot
• generality
• kernel
• mass
• net
• idea
• marrow
• purport
• centerpiece
• nub
• pith
• quick
• keynote
• count
• grist
• nubbin
• point
• essentiality
• argument
• debate
• subject matter
• question
• bottom
• matter
• subject
• topic
• motive
• content
• theme
• affair
• talking point
• motif

Dissimilar Words

• aside
• tangent
• digression
• excursion
• parenthesis
• interjection

Synonym Chooser

How is the word fundamental different from other adjectives like it?

Some common synonyms of fundamental are cardinal, essential, and vital. While all these words mean "so important as to be indispensable," fundamental applies to something that is a foundation without which an entire system or complex whole would collapse.

fundamental principles of algebra

When might cardinal be a better fit than fundamental?

The words cardinal and fundamental can be used in similar contexts, but cardinal suggests something on which an outcome turns or depends.

a cardinal rule in buying a home

When would essential be a good substitute for fundamental?

Although the words essential and fundamental have much in common, essential implies belonging to the very nature of a thing and therefore being incapable of removal without destroying the thing itself or its character.

conflict is essential in drama

When could vital be used to replace fundamental?

The words vital and fundamental are synonyms, but do differ in nuance. Specifically, vital suggests something that is necessary to a thing's continued existence or operation.

cut off from vital supplies

Example Sentences

Recent Examples of fundamental

Adjective

Businesses thrive or fail based on market fundamentals—supply, demand, innovation, efficiency—not on the whims of a government handout. —David Faris, MSNBC Newsweek, 16 June 2025

Importantly, farmland’s underlying value remains rooted in biological fundamentals: Crops continue to grow, and land productivity endures regardless of broader market cycles. —Artem Milinchuk, Forbes.com, 12 June 2025

Noun

The concerns are about more than just finding pieces of things For the Anishinaabeg – which include the Odawa, Ojibwe and Potawatomi – burials have been fundamental to their way of life for thousands of years, and deeply tied to the waters flowing through the Straits of Mackinac. —Caitlin Looby, jsonline.com, 3 July 2025

Still, there are reasons to be skeptical about the future of AI when current models still routinely hallucinate basic facts, show fundamental issues when attempting reasoning, and struggle with basic tasks like beating a children’s video game. —ArsTechnica, 3 July 2025