This is the 6772nd most frequent Swedish word.
nordirlands
"Nordirlands" is Swedish for "Northern Ireland."
Here, 'Nordirlands' is used as a proper noun in possessive form indicating that Belfast is the capital city belonging to Northern Ireland.
Nordirlands huvudstad är Belfast.
Northern Ireland's capital city is Belfast.
In this usage, 'Nordirlands' acts as an adjective modifier in possessive form, providing specific detail about the 'coastline' being the one belonging to Northern Ireland.
Jag skulle vilja besöka Nordirlands kustlinje.
I would like to visit Northern Ireland's coastline.
Here, 'Nordirlands' describes the region, again using the possessive form to specify that the mentioned region is related to Northern Ireland.