We don't have synonyms for lockdowns yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are lookdown, lockdown and lookdowns.
(n) :
The confinement of people in their own rooms (e.g., in a school) or cells (in a prison), or to their own homes or areas (e.g., in the case of a city- or nation-wide issue) as a security measure after or amid a disturbance or as a non-pharmaceutical intervention in a pandemic.
(n) :
(US) A contrivance to fasten logs together in rafting.
(n) :
The confinement of people in their own rooms (e.g., in a school) or cells (in a prison), or to their own homes or areas (e.g., in the case of a city- or nation-wide issue) as a security measure after or amid a disturbance or as a non-pharmaceutical intervention in a pandemic.
(n) :
(US) A contrivance to fasten logs together in rafting.