Not a full list by any means list.
Taken from notes made over many years of research in the writing of "This Mighty Isle".
These listed, are the ones that raised my imagination.
Proper recognition to authors and book titles given at end,but Not in any order or detail.
My thanks to all these Authors.

"Sidhe"(shee) A Treaty was made with the Sidhe,who are to Inhabit mounds and Hills,but Not the Daylight Lands.Their Realm is there but out of Normal Sight.Entrances are to the other Lands,between Stones or Trees in a field or mound.[ The Air is Somhow Different and Dizzy.] [Sidhe are the Tuatha De Danaan of the Hollow Hills.][To Circle a Mound Nine Times Deosil,Could oprn the Way To THE Faerie Ground]

"Snowdonia" [Shining Nest of Eagles] North Wales.

"Solstice" Sun Standstill.[Summer Solstice/Winter Solstice]

"Spirit of the Circle" [Time/Place/Ancestors/Tribe/Spirit of the Journey.] (We Become Increasingly Empowered as we are Fed by, The Richness of the Place/The Richness of the Time/ The Treasures of the Tribe/ The Treasures of the Ancestors and The Joy of the Journey.)

"Songs" Druid.

Hey Down,Down Dery Down,
Hai Down Ir Danno
Come Let Us Haste To the Oaken Grove.

Or the Celtic

Dun Dun Daragan Dun,
To the Hill,To the Hill, To the Oaks,To the Hill.

Ai Tra La,La Li, Addressing the Rising Sun.

The Three Ravens.

There were three Ravens Sat on A Tree,
Down-a-Down! Hey Down! Hey Down!
They were as Black as Black Might Be,
With A Down!
Then One of Then Said To His Mate,
Where Shall We Now Our Breakfast Take.

"Sandav" A Warrior.[One of the Survivors of the Battle of Camlann(Arthurs Final Battle)His Survival Attributed To His Wondrous Beauty,Everyone Mistook Him For an Angel,No one Dared Strike Him]

"Saronides" The Oak, Greek Appelation for Oak."

"Sarah" Mark of High Honour,

"Saron" Hills With Woods.

"Spiral" Day/Night/Life/Death.[Clockwise Spiral-Deosil][Counter Clockwise Spiral-Tuathail]

"Salisbury Plain" The Land of the Giants Choir.

"Soul-Caking" Giving a Spice Cake in Payment for Prayers for the dead.

"Soul-Caged"[When the Human Degenerates his or her Actions.]

"Sword of Socht"(Hard-Headed)[Cuchulainns Sword][One Delorous stoke from the Blade Would make two halfs of a Man, and for a Long Time,One Half Would Not Hear or Perceive,What Had Befallon the Other.]

"Snake-Stone"(Gleineu Nadroeth) Small Glass Amulate the Size of little finger nail,Greenor Blue Waved with Red and White.

"Stonehenge" Coir Mhor.[Alter Stone, When Stood Upright as it Once was,Covered With Gold Tha Lit up At Solstice](Caer Moir) Continuous Circle Enclosed is a Ellipse Broken at One end to resemble Horseshoe.Five Seperate Dolmens.Between were a Ring of Thirty Smaller Posts.Within the Horshoe,Stood another Horseshoe of Fifteen Similar Small Posts,Arranged in Five Sets of Three,To Correspond with the Five Large Dolmens.](Horseshoe=ASS)

"Sucellus" Hammer God,North East Gaul.

Book of Druidry(Ross Nichols)Mythology of the British Isles(Geoffrey Ashe)Ancient Faith of Britain(Dudley Wright)Druid Way(P Carr-Gom)Druid Renaissance(P Carr-Gom)The Encyclopedia of Celtic Wisdom(Caitlin and John Matthews)Glastonbury,Avalon off the heart(Dion Fortune)The White Goddess(Robert Graves)Druidry(Philip Shallcrass)Avalonian Quest(Geoffrey Ashe)Druid Animal Oracle(Philip and Stephanie Carr-Gom)Arthurian Myth and Legend(Mike Dixon-Kennedy)The Voice Within the Wind(Greywind) The Druid Sourse Book(John Matthews)Gods of the Celts(Miranda Green)The Lore of the Bard(Arthur Rowen)The Celtic Year Book(John King)Pagan Pathways(Emma Restall-Orr)Act of God(Philips)Bloodline of the Holy Grail(Laurence Gardner)Dead Sea Scrolls Deception(Richard Leighand Michael Baigent)Magi(G Ash)Witches,Druids and King Arthur(Ronald Hutton)Living Druidry(Emma Restall-Orr)The mystical Qabalah(Dion Fortune)Secrets of the Druids(John Matthews)The Bible.