“SPIFFILY” is a valid word. — 19 points Scrabble

flipsan acrobatic feat in which the feet roll over the head (either forward or backward) and return
spiffattractiveness in appearance or dress or manner
pilis

lipseither of two fleshy folds of tissue that surround the mouth and play a role in speaking
slipa socially awkward or tactless act
flipan acrobatic feat in which the feet roll over the head (either forward or backward) and return
iffysubject to accident or chance or change
lispa speech defect that involves pronouncing `s' like voiceless `th' and `z' like voiced `th'
yipsnervous tension that causes an athlete to fail (especially causes golfers to miss short putts)
pili
fils100 Yemeni fils are worth one Yemeni rial
pily
syli

flytwo-winged insects characterized by active flight
spy(military) a secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors
lipeither of two fleshy folds of tissue that surround the mouth and play a role in speaking
sipa small drink
slymarked by skill in deception
ifs
yipa sharp high-pitched cry (especially by a dog)
psia unit of pressure
lis
plyone of the strands twisted together to make yarn or rope or thread; often used in combination
fil
iff
pis

ishave the quality of being; (copula, used with an adjective or a predicate noun)
if
lia soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals
sia tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
pithe ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846...

SPIFFILY