This is the 11662nd most frequent Russian word.
жилищно
Relating to housing or residential matters.
The word 'жилищно' is used as part of a compound adjective 'жилищно-коммунальное', which relates to housing and utilities.
Жилищно-коммунальное хозяйство играет важную роль в обеспечении удобства горожан.
The housing and communal services sector plays an important role in providing convenience to urban residents.
Here, the word 'жилищная' (adj. form) pertains to 'жилищно', indicating an issue related to housing.
Эта жилищная проблема требует немедленного решения.
This housing problem requires an immediate resolution.
In this sentence, the word is also used in an adjectival form to signify something relating to housing (housing program).