Synonyms for Expositive:

adj.

all (adjective)
expository.
explanatory (adjective)
expository, informative, Hermeneutic, Hermeneutical, interpretive, Explicative, illustrative, instructive, Explanative, interpretative, exegetic, elucidative.

n.

elucidative, exegetic, illustrative, interpretive, explanatory, Hermeneutic, explain, Explicative, Hermeneutical, Explanative, interpretative. expositive (noun)
expository, instructive, informative.

Other synonyms:

Explanative, interpretative, Explicative, interpretive, exegetic, elucidative, Hermeneutical, Hermeneutic. illustrative, explanatory. Other relevant words:
exegetic, elucidative, Explanative, interpretative, Hermeneutic, Explicative, interpretive, explanatory, Hermeneutical, illustrative.