Synonyms for Proximate:

adj.

approaching (adjective)
closing, expected, imminent, forthcoming, coming, Looming, nearby, impending, near, converging, advancing, approaching.
close (adjective)
forthcoming, near, nigh, imminent, nearby.
near (adjective)
by, nearby, hairbreadth, immediate, local, adjacent, neighborhood, near, close.

n.

nigh, contiguous. momentary.

Other synonyms:

contiguous. momentary. Other relevant words:
contiguous, momentary, nigh.