predecessor vs indicant

predecessor and indicant both are nouns.

Word	Noun	Adjective	Verb	Adverb
predecessor	Yes	No	No	No
indicant	Yes	No	No	No

As nouns, indicant is a hypernym of predecessor; that is, indicant is a word with a broader meaning than predecessor:

predecessor: something that precedes and indicates the approach of something or someone
indicant: something that serves to indicate or suggest

Other hypernyms of predecessor include indication.

predecessor (noun)	indicant (noun)
something that precedes and indicates the approach of something or someone	a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time
one who precedes you in time (as in holding a position or office)	something that serves to indicate or suggest