Third revision:
Adieu (subtracted due to The Sound Of Music's "So Long, Farewell")
Assinaboine
Bounding Main (subtracted due to Godfrey Marks's "Sailing, Sailing, Over The Bounding Main")
Casino Rama
Catbird (subtracted due to The Old Ceremony's "Catbird Blues")
Chaste (subtracted due to PT Grimm & The Dead Puppies' "Chaste Makes Waste")
Couchiching
Dumoine
Finery (subtracted due to Lorde's "Team")
Flagon (subtracted due to The Whitlams' "Pass The Flagon")
Flotsam (subtracted due to Peter Gabriel's "Flotsam And Jetsam")
Flywheel (subtracted due to The Cramps' "Naked Girl Falling Down The Stairs")
Gentry (subtracted due to Cahn & Van Heusen's "Love and Marriage", recorded by Frank Sinatra")
Gitche-Gumee (subtracted due to Henry Wadsworth Longfellow's poem "The Song of Hiawatha", later recorded as a song by Laurie Anderson and others)
Haloed (subtracted due to Jack Rhodes & Dick Reynolds' "Silver Threads And Golden Needles" recorded by Wanda Jackson and later by Linda Ronstadt)
Hangdog (subtracted due to Drag The River's "Hangdog")
Hexagram (subtracted due to Deftones' "Hexagram")
Hornepayne
Ironcast (subtracted due to DevilDriver's "The Blame Game")
Ironclad (subtracted due to Sleater Kinney's "Ironclad")
Joneses (subtracted due to Boz Scaggs’s “Lowdown”)
Kinsale (subtracted due to Third Eye Blind's "Kinsale Harbour")
Lee of an island etc (subtracted due to Crosby Stills Nash and Young’s “The Lee Shore”)
Lemon Lilies
Mariners (subtracted due to The Decemberists' "The Mariner's Revenge Song")
Mendocino (subtracted due to Kate & Anna McGarrigle's "Talk To Me Of Mendocino")
Muskeg (subtracted due to Wade Hemsworth's "The Land Of The Muskeg")
Muskie, also spelt
Musky (subtracted due to Brian Schram's "Musky Maniac")
Navvies (subtracted due to Ian Campbell's "Here Come The Navvies")
Nous Vivons Ensemble (and other French vocabulary in that song)
Oft-times (subtracted due to Bob Dylan's "Days of '49")
Penzance (subtracted due to Ian Anderson's "Old School Song")
Polka Dot Underwear (subtracted due to Scott Walker's "Plastic Palace People")
Prima Donna (subtracted due to Chicago's "Prima Donna")
Quietude (subtracted due to David Bowie's "I Would Be Your Slave")
Resolute (subtracted due to Yellow Second's "Resolute")
Ringneck
Rural Sprout
Scrimshaw (subtracted due to The Rainmakers' "Tattoo")
Sliderule (subtracted due to Sam Cooke’s “Wonderful World”)
Spectre (subtracted due to The Pogues' "Turkish Song Of The Damned")
Starcase
Stemming in relation to gold (apparently a unique lyric in this context, although other songwriters have used the word in a different context)
Tattletale (subtracted due to Faron Young's "Tattle Tale Tears")
Uptight (subtracted due to Stevie Wonder's "Uptight (Everything's All Right")
Verdant (subtracted due to the traditional carol "O Christmas Tree")
Vocabulary (subtracted due to Burl Ives's "The Same Old Hurt")
Wherefore (subtracted due to Petula Clark's "Don't Sleep In The Subway").
After starting this thread, I discovered the website
www.lyrics.net , which provided a lot of the information leading to subtractions. As you can see, not much is left!