A four-way orgy of etymology.
Proto-Indo-European *werh₁- "to speak" (not to be confused with *wer- or *wērh₂-o- or even *h₂wer- or *wer- or *wer- or *weh₁-r-) in its suffixed zero-grade form *wrh₁-dʰo- became Proto-Germanic *wurđam and then word.
In Latin, *werh₁-dʰo- became verbum "word", which was borrowed into English as verb.
The form *werh₁-yo- became Greek εἴρω eirō "to say". From this came εἴρων eirōn "someone who pretends" and εἰρωνεία eirōneia "pretending, putting on a false appearance". eirōneia was borrowed into Latin as īrōnīa "irony", which became irony thru Old French.
The form *wrē-tōr- became Greek ῥήτωρ rhētōr "public speaker" and English rhetoric.