1. alone

isolated from others

Example Sentences:
'could be alone in a crowded room'
'was alone with her thoughts'
'I want to be alone'

2. alone, lone, lonely, solitary

lacking companions or companionship

Example Sentences:
'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'

• lone
• lonely
• solitary

3. alone, only

exclusive of anyone or anything else

Example Sentences:
'she alone believed him'
'cannot live by bread alone'
'I'll have this car and this car only'

• only

4. alone, unequaled, unequalled, unique, unparalleled

radically distinctive and without equal

Example Sentences:
'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'

• unequaled
• unequalled
• unique
• unparalleled

• incomparable
• uncomparable

5. alone, entirely, exclusively, only, solely

without any others being included or involved

Example Sentences:
'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'

• entirely
• exclusively
• only
• solely

6. alone, solo, unaccompanied

without anybody else or anything else

Example Sentences:
'the child stayed home alone'
'the pillar stood alone, supporting nothing'
'he flew solo'

• solo
• unaccompanied