"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"

"felt sad and lonely"
"the loneliest night of the week"
"lonesome when her husband is away"
"spent a lonesome hour in the bar"

"a lone wolf"
"a lonely existence"
"a man of a solitary disposition"
"a solitary walk"

"a lonely crossroads"
"a solitary retreat"
"a trail leading to an unfrequented lake"