Synonyms of 'complacency'
smugness, satisfaction, gratification
She warned that there was no room for complacency on inflation.
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Contentment is a feeling of quiet happiness and satisfaction.
I cannot describe the feeling of contentment that was with me at that time.
Eventually they recognized him, much to his gratification.
Thesaurus for complacency from the Collins English Thesaurus
Complacency is being complacent about a situation .