alone

without any others being included or involved

• “was entirely to blame”
• “a school devoted entirely to the needs of problem children”
• “he works for Mr. Smith exclusively”
• “did it solely for money”
• “the burden of proof rests on the prosecution alone”
• “a privilege granted only to him”

without anybody else

• “the child stayed home alone”
• “he flew solo”

isolated from others

• “could be alone in a crowded room”
• “was alone with her thoughts”
• “I want to be alone”

lacking companions or companionship

• “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”

exclusive of anyone or anything else

• “she alone believed him”
• “cannot live by bread alone”
• “I”

radically distinctive and without equal

• “he is alone in the field of microbiology”
• “this theory is altogether alone in its penetration of the problem”
• “Bach was unique in his handling of counterpoint”
• “craftsmen whose skill is unequaled”
• “unparalleled athletic ability”
• “a breakdown of law unparalleled in our history”