Question: I like to know what you guys think about using feedback as a verb. I've seen it a whole lot in writing and email communications. What would be other alternatives? 
Your input is appreciated. 

Thank you,

Answer: 
*Feed back* (or *feed-back*) is already a verb in English. 

If someone wants to spell it as *feedback* and extend its usage to mean *to provide feedback*, that is fine, but it would only be an extension of an already existing verb.

Both *feedback* (also spelled *feed-back*) as a noun and as a (phrasal) verb exist from the early 1920s, first in the field of radio-telegraph technology. So "feed back" is already a verb in English. Whether *feed back*, *feed-back*, and/or *feedback* gains wider usage is unknown to me.

The *Oxford English Dictionary* (OED) provides the following. 

> 
> **to feed back** (Electronics and Cybernetics)  
> 
>  (a) to return (a fraction of an output signal) to an input of the same or a preceding stage of the circuit, device, process, etc., that produced it. Also transferable. Chiefly in passive. (Cf. feedback *noun*)
> 
> 
> 1921 *Wireless World* 10 Dec. 571/2 The magnified oscillations are fed back again into the grid circuit.
> 
> 
> 

There are other example sentences and they are all spelled *fed-back* or *fed back*, whether used in the passive or not. To me this looks like a phrasal verb.

> 
> (b) In transferred sense also used intransitively. of a result or effect of a process: **to return as feedback**; to affect or modify the process that brought it about.
> 
> 
> 

Here is only one example from the OED:

> 
> 1966 *Rep. Comm. Inq. Univ. Oxf.* I. 56 There are also advances in social studies, at postgraduate level, that are likely to feed back into undergraduate work.
> 
> 
> 

The verb already exists. To *feedback* in the sense of *provide feedback* to someone would just be an extension of its usage.
Feedback is a verb phrase. If you want to change the verb's tense, number, *et cetera*, you should modify "feed" separately from "back". For example:

* Feedback loops occur when the output from a system is fed back into the system.