I am still looking for title words to add to one of my current projects. I cannot guarantee your word will be chosen for the theme of a poem, but if it is, I will give proper acknowledgement when the book is published.
Here are the current title words for the letter "S."
Saintly
Saudade
Scarf
Schadenfreude
Seasons
Shimmer
Shock
Silence
Silent
Silhouette
Simmer
Simplify
Sleep
Sludge
Smaragdine
Smattering
Snippet
Solitary
Solitude
Sparkle
Spicy
Static
Stifle
Sting
Strategy
Strut
Study
Succumb
Superficial
Surreal
Suspicious
Sympathy
Synchronize