I'd like to share something to help clarify what I'm saying. I was taught the following about "preaching"...
Preaching: 2782 // khrugma // kerugma // kay'-roog-mah //
from 2784 ; TDNT - 3:714,430; n n
AV - preaching 8; 8
1) that which is proclaimed by a herald or public crier, a
proclamation by herald
2) in the NT the message or proclamation of the heralds of God or
Christ
"Preaching" is therefore a general and all encompassing term for a NT message, or proclamation, that may include any or all of the following:
Prophesy
Teaching
Admonition
Rebuke
Exhortation
Testimony
With this in mind, in a preacher's "preaching" they might prophesy, teach, admonish, rebuke, testify, and/or exhort. Technically one can even give a witness while "preaching", seeing that any one of these elements "witness" to Christ's gospel, power, doctrine, or authority. A preacher's "preaching" might include any one of these elements... or even all of them.
Thus, if a woman can be permitted to "prophesy" in the gathering ...her "prophesying" is indeed a form of "preaching" and is perfectly permissible.
Do you disagree with this? If so, share what you were taught.