Synonyms for Love seat:

n.

artifact (noun)
vis-a-vis.
couch (noun)
ottoman, chesterfield, divan, couch, lounge, settee, davenport, day bed.
love seat (noun)
vis-a-vis, tete a tete.

Other synonyms:

tete-a-tete
tete a tete.
Other relevant words:
vis-a-vis.