Synonyms of theme in English:

theme


See definition of theme

noun

1‘a short speech on a theme of your choice’

SYNONYMS
subject, topic, subject matter
matter, issue, question, concern
idea, concept, thread, motif, trope, keynote, message
thesis, argument, text
gist, essence, core, substance, burden, thrust

2‘the first violin takes up the theme’

SYNONYMS
melody, tune, air, motif, leitmotif

3‘students writing themes in French’

SYNONYMS
essay, composition, paper, dissertation