Crossword Clue:

a word having the same meaning as another also SYNONYME

AnswerCrossword Clue
HOMOGRAPHWord spelled the same as another but with a different meaning
PARONYMLinguistic term for a word that's almost the same as another word, like "affect" and "effect"
IDEMBibliography word meaning "the same as previously mentioned"
ISOTOPEElement having same atomic number as another.