What phrases/actions are used when reffing but are incorrect

[APHP]

The Officials Manual (Page 68) says nothing about "verbally" reporting the nature of the foul to the table--only a visual signal (i.e. holding/block). I never give a verbal signal to the table....however, I do see officials verbally say "reach-in", "over the back" and I know one who calls a "hack". Why give a verbal signal if it is not required...