As nouns the difference between kuwaiti and nisba
is that kuwaiti is kuwaiti while nisba is -íyya (f), which has given rise to english adjective ending -i - iraqi, kuwaiti, bahraini, pakistani, etc.
As an adjective kuwaiti
is kuwaiti.
kuwaiti
English
Noun
(
en noun)
A person from Kuwait or of Kuwaiti descent.
Adjective
(-)
Of, from, or pertaining to Kuwait or the Kuwaiti people.
nisba
English
Noun
(-)
-íyya (f), which has given rise to English adjective ending -i - Iraqi, Kuwaiti, Bahraini, Pakistani, etc.