All 16 words, sorted alphabetically. Group them into four categories of four.
The four category names, easiest to hardest. No words revealed yet.
Theme name plus one word from each category.
BERKSHIRE (Hathaway), CITI(group), GOLDMAN (Sachs), and MERRILL (Lynch) are all major financial firms commonly referred to by these shortened names.
ADIRONDACK, EAMES, WINDSOR, and WINGBACK are all well-known styles or types of chairs, each recognized by their distinctive design.
COMFORT Inn, DAYS Inn, HAMPTON Inn, and HOLIDAY Inn are all hotel chains whose names end with the word 'Inn'.
Each word contains the hidden word 'SKILL' (a talent): catSKILLs, knickknackSKILL... actually, they each end in letters spelling out a synonym of talents: CATSKILL(s), KNICKKNACK, PIANOFORTE, and STABILITY each conceal the word 'ILLS'... they each contain hidden within them the word referring to talents/abilities.