synchronized swimming

US /ˌsɪŋ.krə.naɪzd ˈswɪm.ɪŋ/
UK /ˌsɪŋ.krə.naɪzd ˈswɪm.ɪŋ/
"synchronized swimming" picture
1.

a sport in which swimmers perform synchronized acrobatic moves in the water, accompanied by music

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She has been practicing synchronized swimming since she was five years old.
The team won a gold medal in synchronized swimming at the Olympics.