General Similarities:
* Alike: This is a very basic and general term.
* Similar: This is another basic and general term, slightly more formal than "alike."
* Comparable: This implies a more specific comparison between the two people.
* Analogous: This suggests a strong similarity in function or structure, even if the details are different.
* Twin souls/spirits: This refers to a deep connection between two people, often involving shared beliefs or values.
Specific Similarities:
* Homogenous: This describes two people who share similar origins or backgrounds.
* Compatible: This suggests that two people are well-suited to each other, often in terms of personality or interests.
* Like-minded: This refers to two people who share similar opinions and beliefs.
* Birds of a feather: This idiom refers to two people who are similar in their interests and behavior.
* Kindred spirits: This suggests a strong emotional connection between two people who share a similar outlook on life.
Other Options:
* Doppelganger: This refers to someone who looks remarkably like another person.
* Soulmates: This is a romantic term referring to two people who are perfectly suited to each other.
The best word to use will depend on the specific context and the type of similarity you want to emphasize.