SUBJECT Synonyms: 169 Similar and Opposite Words - Merriam-Webster
https://www.merriam-webster.com/thesaurus/subject
WEBSynonyms for SUBJECT: topic, matter, theme, question, motif, content, essence, idea; Antonyms of SUBJECT: aside, tangent, excursion, digression, parenthesis, interjection, alien, stranger.
DA: 64 PA: 21 MOZ Rank: 29