1 lone

2 lonely

1 orphan

1 lone

2 lonely

3 loneliness

1 lonely

2 solitary

1 obsessive-compulsive disorder (OCD)

1 obstinately clinging to one's course (idiom)

2 willful

3 one's own way

4 dogmatic

1 one who is cut off from others (idiom)

2 one who has chosen to follow a solitary path

3 (can also be an indirect way of referring to an unmarried person)

1 alone in the world (idiom)

1 lone flower admiring itself (idiom); narcissism

2 self-love

1 solitary and impoverished (idiom)