Sorry, the term acknowledgement frames is not in the dictionary. Check the spelling and try removing suffixes like "-ing" and "-s".
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Nearby terms:
ACIA ♦ ACID ♦ ACIS ♦ ACK ♦ ACL ♦ ACM ♦ ACME ♦ ACOM ♦ acorn ♦ Acorn Archimedes
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