One literary device is doppelganger, where two characters closely resemble each other physically or in personality traits. Another device is parallel characters, where two characters have similar attributes that contrast or complement each other, highlighting their differences or similarities. These devices can add depth to the story by exploring themes of identity, duality, or destiny.
Doppelganger
It is alike by any way you want it to be.
They are both computer input devices.
No dumbos!
Alike
Synonyms are words alike in meaning, and antonyms are opposite in meaning.
alike, identical, similar
alike
Technology is the application of science to create devices or machines that benefit mankind.
You answered your own question, the answer is: Similar.
Effect and affect
similarities mean things that are alike or similar in meaning.
Being alike. Something closely related to another thing.