Unusual words [G;S].

• gamophobia: fear of marriage
• gastropod: mollusks including snails; slugs; whelks
• gatefold: oversized page in a book
• gaumless: stupid; witless; vacant
• gelid: extremely cold
• gelogenic: tending to produce laughter
• gemel: twinned; occurring in pairs
• genethlialogy: the art of casting horoscopes
• goliard: wandering student
• goluptious: delightful; luscious
• gratis: without charge; for free
• graphomania: obsession with writing
• graphophobia: fear of writing
• sadogue: fat; easy-going person
• saffron: orange-yellow
• semestral: half-yearly
• semper: always
• senescent: growing old
• senicide: killing of old man
• senocular: having six eyes
• shend: to destroy; to ruin; to disgrace; to corrupt
• significs: science of meaning
• sitophobia: fear of food or eating
• smalt: deel blue
• solivagant: wandering alone
• solus: alone
• somatasthenia: weakness of the body
• somewither: to some place; somewhere
• somnolescent: half-asleep 
• sooth: truth; reality; in truth
• sparsim: here and there
• spectrology: study of ghosts
• spirate: voiceless
• spiration: act of breathing
• stelliferous: having many stars
• subboreal: very cold
• subrident: smiling