Some common synonyms of attribute are ascribe, assign, credit, and impute. While all these words mean "to lay something to the account of a person or thing," attribute suggests less tentativeness than ascribe, less definiteness than assign.
Is attribute a synonym of quality?
Some common synonyms of quality are attribute, character, and property.
What is a synonym for unique attribute?
Some common synonyms of unique are eccentric, erratic, odd, outlandish, peculiar, quaint, singular, and strange. While all these words mean "departing from what is ordinary, usual, or to be expected," unique implies singularity and the fact of being without a known parallel.