teaching vs educational activity

teaching and educational activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
teaching	Yes	No	No	No
educational activity	Yes	No	No	No

As nouns, teaching and educational activity are synonyms defined as:

teaching and educational activity: the activities of educating or instructing; activities that impart knowledge or skill

Other synonyms of teaching include didactics, education, instruction, pedagogy.

teaching (noun)	educational activity (noun)
the profession of a teacher	the activities of educating or instructing; activities that impart knowledge or skill
the activities of educating or instructing; activities that impart knowledge or skill
a doctrine that is taught