What is a synonym for "premises"?

Common synonyms include: accommodation, air space, airspace, antecedents, area, basis.

Premises

/ˈpɹɛmɪsɪz/ noun, verb, slang

noun, verb, slang ·Common ·High school level

Noun

1
plural of premise form-of, plural
2
Land, and all the built structures on it, especially when considered as a single place. plural, plural-only
"The caretaker lives on the premises."
3
land and the buildings on it wordnet
4
The subject of a conveyance or deed. plural, plural-only
5
The vagina. euphemistic, obsolete, plural, plural-only, slang
"[…] ſhe charges her to put him to it as a virgin ought to do; and farther, that as ſoon as he entered the premiſes, with fome feigned reluctancy on her part, muſt fall into a fainting ſhriek, as if ſhe had fallen into a cold water in a hot fit."

Verb

1
third-person singular simple present indicative of premise form-of, indicative, present, singular, third-person

"We should understand the underlying premises."

See premise