Synonyms for Nonverbal:

adj.

all (adjective)
gestural.

n.

person-to-person, illocutionary, verbal, one-on-one, interactive, paralinguistic, one-to-one, expressive. nonverbal (noun)
gestural, communicative, numerical, communicatory, mathematical.

Other synonyms:

one-on-one, expressive. interactive, one-to-one, person-to-person. verbal. Other relevant words:
person-to-person, illocutionary, verbal, one-on-one, interactive, paralinguistic, one-to-one, expressive.