Proviso is a related term of provisional.
As nouns the difference between provisional and proviso
is that provisional is a postage stamp issued locally before an official issue is released while proviso is a conditional provision to an agreement.
As an adjective provisional
is temporary.
provisional
English
Adjective
(head)
temporary
Noun
(philately) a postage stamp issued locally before an official issue is released.
proviso
English
Noun
(en-noun)
A conditional provision to an agreement
Related terms
* provide
* provision
* provisional