We don't have synonyms for contenement yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are confinement, contentment and condonement.
(n) :
That which is connected with a tenement, or thing holden, as a certain quantity of land adjacent to a dwelling, and necessary to the reputable enjoyment of the dwelling.
(n) :
That which is held together with another thing.
(n) :
That which is connected with a tenement, or thing holden, as a certain quantity of land adjacent to a dwelling, and necessary to the reputable enjoyment of the dwelling.
(n) :
That which is held together with another thing.