I like this word:
convivant, noun, (“kän-vE-‘vänt, “kOn-vE-‘vän)
A committed, romantic partner with whom you share living space.
It makes me think of bon vivant and vivacity and all those other lovely, lively words.
(Source: See http://www.livejournal.com/users/rjray_rss/48728.html via