twin

nouns

either of two offspring born at the same time from the same pregnancy
is a type of (narrower)
a person's brother or sister
a duplicate copy

verbs

duplicate or match
"The polished surface twinned his face and chest in reverse"
bring two objects, ideas, or people together
"This fact is coupled to the other one"; "Matchmaker, can you match my daughter with a nice young man?"; "The student was paired with a partner for collaboration on the project"
grow as twins
"twin crystals"
is a type of (narrower)
increase in size by natural process
"Corn doesn't grow here"; "In these forests, mushrooms grow under the trees"; "her hair doesn't grow much anymore"
give birth to twins
is a type of (narrower)
cause to be born
"My wife had twins yesterday!"

adjectives

being two identical