1. talking
2. conversation, discussion
3. treatment, discourse, lecture
4. lecturing, lecture
5. public lecture, address, speech, talk of the town

1. gossip, comment, scuttlebutt, speak
2. communicate, intercommunicate, speak
3. utter, mouth, verbalize, verbalise, communicate, intercommunicate, speak
4. communicate, intercommunicate, spill
5. tell, spill the beans
6. let the cat out of the bag, tattle, blab, peach, babble, sing, babble out, blab out, disclose, let on, bring out, reveal, discover, expose, divulge, impart, break, give away, let out, lecture
6. teach, learn, instruct