Unaccompanied
Part of speech: adjective
Definition: travelling without companions performed or scored without accompaniment; solo
Lonely
Part of speech: adjective
Definition: Of person, unhappy by feelings of loneliness.Of place, unfrequented by people; desolate.Of person, without companions; solitary.
Example sentence: Our uniqueness makes us special, makes perception valuable - but it can also make us lonely. This loneliness is different from being 'alone': You can be lonely even surrounded by people. The feeling I'm talking about stems from the sense that we can never fully share the truth of who we are. I experienced this acutely at an early age.