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The definition of 'strengtheners' & the word 'strengtheners' in example sentences or phrases

Noun
1
a device designed to provide additional strength
  1. the cardboard backing was just a strengthener
  2. he used gummed reinforcements to hold the page in his notebook

Synonyms of the word 'strengtheners' & Antonyms of the word 'strengtheners'.

Noun
Synonymsstrengthener, reinforcement,