S E W (?) $\checkmark$ Rubio
S E W (?) → South East West North, therefore (N)?
S W S (?) $\checkmark$ JonMark Perry
Spring, Winter, Summer, Autumn
T I M R (?) $\checkmark$ mnemonic
Thumb, Index, Middle, Ring, Pinky
S S T T (?) $\checkmark$ ffao
Smell, Sight, Touch, Taste, Hearing
R K K B P (?) $\checkmark$ ffao
Rook, King, Knight, Bishop, Pawn, Queen
S T U B C (?) $\checkmark$ Kevin Long
Strange Top Up Bottom Charm Down (types of quarks)
D T R S M F (?) $\checkmark$ Kevin Long
Do Ti Re So Mi Fa La
D D G H S S (?) $\checkmark$ indubitablee
Doc, Dopey, Grumpy, Happy, Sleepy, Sneezy, Bashful
G O B I R Y (?) $\checkmark$ Silenus
Red Orange Yellow Green Blue Indigo Violet. So the missing letter is V.
A A A A A A (?) $\checkmark$ indubitablee
Asia, (North) America, (South) America, Africa, Australia, Antarctica, Europe
J U M M E N N S (?) $\checkmark$ JonMark Perry
Jupiter, Uranus, Mercury, Mars, Earth, Neptune, Nine, Saturn, Venus
M A D O N S J A M (? ? ?) $\checkmark$ Ian MacDonald
March April December October November September January August May July February June
J J A F F S S E N T T T (? ?) $\checkmark$ ffao
Joker, Jack, Ace, Four, Five, Six, Seven, Eight, Nine, Ten, Two, Three, Queen, King