This is the 10782nd most frequent French word.
nonantième
Ninetieth.
Nonantième is used as an ordinal number to describe a specific floor of the building.
Cet immeuble est si grand que je vis au nonantième étage.
This building is so tall that I live on the ninetieth floor.
Nonantième is used to denote the ordinal position in the sequence of her birthdays.
Elle célèbre aujourd'hui son nonantième anniversaire.
She is celebrating her ninetieth birthday today.
Nonantième is used to indicate the ordinal position within a ranking or list.