indicative vs indicatory

indicative is a noun but indicatory is not a noun.

Word	Noun	Adjective	Verb	Adverb
indicative	Yes	Yes	No	No
indicatory	No	Yes	No	No

As adjectives, indicative and indicatory are synonyms defined as:

indicative and indicatory: (usually followed by `of') pointing out or revealing clearly

Other synonyms of indicative include revelatory, significative, suggestive.

indicative (noun)	indicatory (noun)
a mood (grammatically unmarked) that represents the act or state as an objective fact

indicative (adjective)	indicatory (adjective)
relating to the mood of verbs that is used simple in declarative statements	(usually followed by `of') pointing out or revealing clearly
(usually followed by `of') pointing out or revealing clearly