Synonyms for Speak:

n.

give, commemorate, parade, dedicate to, chair, inaugurate. confabulate, express yourself, visit, words, confab, put (something) into words, communicate. code switching, anglophone, encode, fluency, fluent, communicative competence, fidelity, bilingual, false beginner. cut off, call-in, busy, caller, dial, call back, call up, answer, busy signal. bespeak, Prelect. stand for, substitute, represent. •speak (noun)
talk, mouth, verbalise, verbalize, address, utter.
•that is to say (noun)
as it were in a manner of speaking, as the saying goes, accordingly.

v.

•address; give a lecture (verb)
recite, orate, talk, Prelect.
•communication (verb)
talk.
•speak (verb)
gab, debate, chatter, vocalize, jabber, say, tattle, prattle, discuss, recite, preach, remark, lecture, orate, patter, talk, babble, chitchat.
•talk (verb)
mouth, gab, articulate, utter, verbalize, whisper, vocalize, communicate, murmur, mutter, voice, say, enunciate, pronounce.
•voice (verb)
exclaim, enunciate, articulate, mutter, pronounce, whisper, utter, cry, groan, intone, voice, murmur, emit, moan.

Other synonyms:

confabulate, Prelect. communicate. bespeak. visit. •articulate
verbalize.
•converse
confab, confabulate.
•indicate
bespeak.

Usage examples for speak

1. What right have you to speak in that way?" – The Duke's Children by Anthony Trollope

2. Now, think before you speak – The Insect Folk by Margaret Warner Morley

3. Why do you speak to me like that? – The Project Gutenberg Plays of John Galsworthy, Complete by John Galsworthy