Supercede means to replace, overtake or displace something or someone. Some synonyms for this word include supplant, override, surpass, surpassing, outstrip, outdo or outpace. Other similar words include exceed, outshine, outrank, overthrow, substitute, undercut, take over and take the place of. Each of these words highlights a certain aspect of the idea of replacing something with something better or more efficient. Supercede can be used in a variety of contexts and it is important to choose the appropriate synonym according to the specific meaning and tone of the sentence.