2
lover(noun, friend, buddy, bud, confidante)
2
man Friday
2
other self
2
parallel(noun, match, equivalent)
2
picture(noun, clone, look-alike)
2
playmate(noun, associate, companion, friend, contemporary)
2
reciprocal(noun, companion, friend, contemporary, acquaintance)
2
right-hand man(noun, assistant)
2
second self(noun, personality)
2
simulacrum(noun, clone, look-alike)
2
sister(noun, friend)
2
supporter
2
vice
2
well-wisher(noun, associate, companion, ally, comrade)
1
twin(noun, match, double, companion, friend)
1
Achates
1
advocate
1
alter
1
alternate
1
alterum
11 years ago|8.8k views|share |citing 
APASmart Define. (2015). alter ego thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/alter_ego/thesaurus/synonyms
ChicagoSmart Define. 2015. "alter ego thesaurus" https://smartdefine.org/alter_ego/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, alter ego thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/alter_ego/thesaurus/synonyms>.
MLASmart Define. "alter ego thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/alter_ego/thesaurus/synonyms>