Synonyms for Lone:

adj.

all (adjective)
lonely, alone, solitary.
by oneself; only (adjective)
particular, unique, isolated, singular, single, unaccompanied, lonesome, alone, sole, one, lonely, deserted, solitary, separate.
celibate (adjective)
maiden, ascetic, monkish, monastic, chaste, intact, single, unwed, asexual, old maid, spinsterish, solitary, unplowed, abstemious, alone, virginal, bachelor, celibate, pure, unmarried, abstinent.
single (adjective)
individual, sole, solitary, singular, unique, single, only, odd.

n.

engaged, estranged, available, de facto, divorced, common-law, live in. include, class, cross-section, category, kind, grouping, sort, variety, Companionless, classification, type, taxonomy. marriage, footloose, Spouseless, fancy-free, unattached. particular, one, separate. isolate, detached, removed, apart, isolated. alone (noun)
in isolation, home alone, (all) on your own, cloistered, (all) by yourself.
lone (noun)
lonesome, alone, lonely, sole, solitary, eremitic, eremitical, only, single, unsocial, unaccompanied.
solitary (noun)
study at alone, deserted.

Other synonyms:

footloose, fancy-free, Spouseless, divorced, Companionless. engaged, isolated, detached, de facto, unattached, one. common-law, available, estranged, live in. removed, particular. alone
home alone, cloistered.
Other relevant words:
individual, fancy-free, removed, lonely, live in, Companionless, footloose, available, isolated, detached, unaccompanied, Spouseless, engaged, eremitical, cloistered, one, unsocial, separate, lonesome, apart, deserted, particular, isolate, eremitic, unattached.