Synonyms for period of validity

Synonyms for period

time period (period of time, time, age >>)
era
flow
interval
menstruation

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Synonyms for of

on (to, in, from >>)
concerning
towards

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Synonyms for validity

correctness (reliability, accuracy, soundness >>)
legality (legitimacy, lawfulness, justification >>)
authenticity
applicability (relevance, suitability, fitness >>)
credibility
effectiveness
fact
adequacy
fairness
duration
legal effect
general validity

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