Create a form which has for example 10 formfields, with an increasing number, like formfield1, formfield2, etc.
Using cfloop you can easily create more fields

<cfset numberoffields = "10">

<cfform action="" method="POST">

<cfloop index="i" from="1" to="#numberoffields#">
    <cfoutput>
        formfield#i#<cfinput type="Text" value="" name="formfield#i#"><br>
    </cfoutput>
</cfloop>

<input type="submit" name="submit" value="Submit">

</cfform>

Now catch the form values when they are submitted.

<!--- check wether the form is submitted --->
<cfif IsDefined ("form.submit")>

<!--- start a loop to loop through the values --->
<cfloop index="i" from="1" to="#numberoffields#">

<!--- dynamically create the form fieldname --->
<cfset formfield = "formfield" & variables.i>
<cfoutput>
    <!--- output the value of the specific formfield --->
    formfield#i# = #form[variables.formfield]#<br>
</cfoutput>
</cfloop>

</cfif>