The plural of the noun need is needs
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The word needed cannot really be pluralised. The plural of needed would be neededs, which does not make sense in English.
The nearest similarity is needs, the plural of need.
The plural form of apparatus is apparatuses. It has no foreign plural.
The plural is technicians.
The plural is productions.
The plural form is technologies.
"Safeties" is the plural for safety.