Formal and Invariable

Formal adjective - Following or agreeing with established form, custom, or rules.

Invariable and formal are semantically related. In some cases you can use "Invariable" instead an adjective "Formal".

Nearby Words: form, formality, formalize, formalise, formative

Invariable adjective - Not capable of changing or being changed.

Formal and invariable are semantically related. Sometimes you can use "Formal" instead an adjective "Invariable".

Nearby Words: invariability, invariably, invariant