What's the difference between swap and swop?

Swap

Definition:

(v. i.) To strike; -- with off.
(v. i.) To exchange (usually two things of the same kind); to swop.
(v. t.) To fall or descend; to rush hastily or violently.
(v. t.) To beat the air, or ply the wings, with a sweeping motion or noise; to flap.
(n.) A blow; a stroke.
(n.) An exchange; a barter.
(n.) Hastily.

Example Sentences:

(1) An IOC member for 23 years he has assidiously collected the leadership of the acronym heavy subsets of that organisation, which may be less riddled with corruption than it was before the Salt Lake City scandal but has swapped outlandish bribes for mountains of bureaucracy.
(2) The disappointing weather at Easter left beaches deserted but some Britons, who were determined to enjoy the outdoors this time round, have already had their plans thwarted by the weather, taking to websites such as ukcampsite.co.uk to swap tales of woe, such as farmers calling to cancel bookings because sites were waterlogged.
(3) Dortmund seemed certain to score after Reus and Grosskreutz swapped passes on the edge of the area and Reuz tapped the ball into the path of Gundogan, charging in to meet it five yards out.
(4) We stayed together for several more years, until I swapped her for a flashy Mazda coupe.
(5) He considers himself more of a tracksuit coach, despite seeing his influence with the younger age groups at St George’s Park diminished since Matt Crocker swapped Southampton for the FA to become head of player and coach development, but would be more than happy to be part of the body’s consultation process as they seek to identify Hodgson’s successor.
(6) Businesses and financial institutions bought swaps as part of their risk management.
(7) More here: UK regulator urges banks to speed up swaps mis-selling compensation 8.40am GMT More reaction to the decision to send riot police to evict people from the offices of Greece's former state broadcaster this morning , starting with journalist Nick Malkoutzis: Nick Malkoutzis (@NickMalkoutzis) 5 mths after flicking switch on public broadcaster ERT, gov't tries to settle issue by sending riot police to remove remaining staff #Greece November 7, 2013 Nick Malkoutzis (@NickMalkoutzis) While #ERT will be off air for good after police intervention, the stain of how its closure has been handled won't wash away easily #Greece November 7, 2013 Lady Mondegreen (@amaenad) Like a mean stupid dog appeasing a cruel master, the Greek government wants to lay ERT's limp body at the troika's feet.
(8) In general it is clear that patients with early infections respond strongly to SEA while response to SWAP are develop more slowly.
(9) Southern said on Tuesday it would reinstate travel passes for staff and allow them to swap shifts, reversing two contentious moves following strike action.
(10) There is no realistic prospect of completing a debt for equity swap.
(11) Run, Dates and The Returned all led the broadcaster into an unusually fruitful August, a period once regarded as a dumping ground for misfiring shows as many viewers swap the TV for their summer holidays.
(12) A tape-swapping culture grew, on plain tapes, without artwork or track lists.
(13) These results show that under the conditions tested, leukocytes appear to react directly with SEA or SWAP thus losing their property of adherence to glass.
(14) Key figures are Frank Lowenstein, Kerry’s special emissary for Middle East peace, and David Makovsky, an expert from the Washington Institute thinktank who specialises in the highly-complex mapping work that will be crucial to any land swaps.
(15) The discovery of "serious failings" in the sale of these so-called interest rate swaps comes as the banking industry is mired in controversy about manipulating interest rates following the record-breaking £290m fine slapped on Barclays on Wednesday.
(16) To define the domains of myogenin responsible for sequence-specific DNA binding, activation of muscle-specific transcription, and cooperativity with other transcription factors, we have generated an extensive series of mutants by site-directed mutagenesis and domain swapping.
(17) Twenty-one individuals at RBS were involved in manipulating the yen and Swiss franc Libor "either falsely high … or falsely low", according to the CFTC, which in turn helped the profitability of swaps positions held by the bailed-out bank.
(18) Attempts by backers of the rebels and the government to orchestrate a population swap have yet to succeed, but an evacuation of the wounded was agreed in late December.
(19) Additional examples were given including stories that Madeleine had been "sold" to ease financial burdens and that the McCanns were involved in "swinging" or "wife-swapping orgies".
(20) BBQ Champ, which will be hosted by Adam Richman, the American presenter of cult TV hit Man V Food, will feature Bake Off-style challenges but swaps pastries and cupcakes for burgers and kebabs.