"synchronal" in the adjective sense
1. synchronous, synchronal, synchronic
occurring or existing at the same time or having the same period or phase
"recovery was synchronous with therapy"- Jour.A.M.A.
"a synchronous set of clocks"
"the synchronous action of a bird's wings in flight"
"synchronous oscillations"
Source: WordNet® (An amazing lexical database of English)
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