Example : He was alone when we met him.
She is alone much of the time.
The lone skier on the mountain.
A lonely fisherman stood on a tuft of gravel.
A lonely soul.
A solitary traveler.

Synonyms : alone, lone, solitary

Example : Felt sad and lonely.
The loneliest night of the week.
Lonesome when her husband is away.
Spent a lonesome hour in the bar.

Synonyms : lonesome

Example : A lone wolf.
A lonely existence.
A man of a solitary disposition.
A solitary walk.

Synonyms : lone, solitary

Example : A lonely crossroads.
A solitary retreat.
A trail leading to an unfrequented lake.

Synonyms : solitary, unfrequented