NOTE: I misunderstood the author's intent (before the addition of the clarifying note that this was about the Rogue Talent, not the Trait). As HeyICanChan said, the Rogue Talent can be used to feint.
Honeyed Words trait:
You receive a +1 trait bonus on Diplomacy checks. In addition, you receive a +1 trait bonus to the DC of any charm or compulsion that does not provide ongoing control and results in peaceful acts, such as calm emotions, sleep, or a suggestion to lay down arms.
None of that grants a bonus to Bluff directly, so we have to look at Feint.
Feint in Combat:
You can also use Bluff to feint in combat, causing your opponent to be denied his Dexterity bonus to his AC against your next attack. The DC of this check is equal to 10 + your opponent’s base attack bonus + your opponent’s Wisdom modifier. If your opponent is trained in Sense Motive, the DC is instead equal to 10 + your opponent’s Sense Motive bonus, if higher. For more information on feinting in combat, see Combat.
(note: the "more information" clarifies that feinting is not a Combat Maneuver, and that there are penalties for feinting against various types of creatures)
While feinting does reference a DC, it's the DC that the feinter must match in order to successfully feint against the opponent (so, you certainly would hope that the +1 trait bonus to that DC doesn't count). Further, the action does not seem to match the spirit of the peaceful acts listed in the trait description.
Additionally, feinting is not described as a charm or compulsion.
Nothing in the RAW would indicate that Honeyed Words would aid in feinting in combat.
Fast-Talker is a trait which would grant a bonus to feint attempts, as it grants a +1 trait bonus to bluff.