central

As adjectives the difference between central and fundamental

is that central is being in the centre while fundamental is pertaining to the foundation or basis; serving for the foundation. Hence: Essential, as an element, principle, or law; important; original; elementary.

As a noun fundamental is

a leading or primary principle, rule, law, or article, which serves as the groundwork of a system; essential part, as, the fundamentals of linear algebra.

As adjectives the difference between central and focal

is that central is being in the centre while focal is belonging to, concerning, or located at a focus.

As adjectives the difference between central and indispensable

is that central is being in the centre while indispensable is not admitting ecclesiastical dispensation; not subject to release or exemption; that cannot be allowed by bending the canonical rules.

As a noun indispensable is

a thing that is not dispensable; a necessity.

As adjectives the difference between central and dismal

is that central is being in the centre while dismal is disappointingly inadequate.

As adjectives the difference between foundational and central

is that foundational is of, or relating to a foundation or foundations while central is being in the centre.

As adjectives the difference between crucial and central

is that crucial is being essential or decisive for determining the outcome or future of something; extremely important while central is being in the centre.

As adjectives the difference between central and integral

is that central is being in the centre while integral is constituting a whole together with other parts or factors; not omittable or removable.

As a noun integral is

a number, the limit of the sums computed in a process in which the domain of a function is divided into small subsets and a possibly nominal value of the function on each subset is multiplied by the measure of that subset, all these products then being summed.

Interior is a related term of central.

As adjectives the difference between interior and central

is that interior is within any limits, enclosure, or substance; inside; internal; inner while central is being in the centre.

As a noun interior

is the inside of a building, container, cavern, or other enclosed structure.

First is a related term of central.

As a noun first

is ridge (of roof).

As an adjective central is

being in the centre.

Inner is a synonym of central.

As adjectives the difference between inner and central

is that inner is being or occurring (farther) inside, situated farther in, located (situated) or happening on the inside of something, situated within or farther within contained within something while central is being in the centre.

As a noun inner

is an inner part.