"twinning" in the verb sense
1. twin, duplicate, parallel
duplicate or match
"The polished surface twinned his face and chest in reverse"
2. match, mate, couple, pair, twin
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"
3. twin
grow as twins
"twin crystals"
4. twin
give birth to twins
"twinning" in the adjective sense
1. biparous, twinning
producing two offspring at a time
Source: WordNet® (An amazing lexical database of English)
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