Mandate.
My favorite word and my favorite color is PUCE.
JAG
That is so much more whimsical than what I had in mi…err, never mind. Any doubts I had whatsoever have now been duly dispelled.
“to go off half-cocked”
It was a while from when I first heard this phrase until I learned that it’s totally innocent.
Sounds like my last date.
Expectorate
“I really wasn’t expecting that to happen!” Tom Swift ejaculated.
Seminal
Seminar
Volvo
Ramekins
Burst Transfer
Hard Drive
Oral Screw
Cummins
Now you’ve forced me to register instead of just lurk: Fokker is (was) a Dutch airplane manufacturer. Always was.
BTW, there’s an old joke about the British Queen knighting a pilot. Pilot gets introduced to her: “he shot down 3 Messerschmidts and 2 Fokkers”. Queen: “Did those Fokkers fly Messerschmits too?”
billhooks
Bollards
Didn’t see this one: petcock.
Motherliquor - it is the mixture of monomers that is eventually heated to become a polymer. It sounds very dirty without meaning anything bad, but it still weird to hear my boss say it.
Dingus
Scrog
Tillicum WA
The Nooksack River
Wenatchee WA
LOL!
Clearly you are confusing innocence with disappointment. 
There are a bunch of dirty-sounding place names in Newfoundland: “A Night in Dildo”, by the Arrogant Worms.
*** Ponder
vuvuzela
I used to work in the reservations department for a major airline. Someone put up a top 10 list of “Things we say on the job that sound dirty, but really aren’t.” I can’t recall all of them, but #1 was:
“Let me pull up his PNR and take a look.”
(PNR=Passenger Name Record, sounded like “Peener” if you said it fast.)
Farding. As in my girlfriend is farding in the bathroom getting ready for a date.
Hoary.
“He kept a collection of hoary books under his bed.”
I can’t figure out if it’s my twisted mind, lack of vocabulary or both, but I can think of a bunch of these.