Redacted
Extrapolate
Subungual
Psionic
Shimmering
Saturation
Zamboni

Phallic

Melancholy
Guffaw
Chortle
Soot
Philistine

phlegm

Quango
Spelunking
Frottage
Glans

caracol (it means snail and also sea shell in Spanish)

Words that give me a little tickle and I endeavor to use as much as possible in my daily discourse:

Squelch

Pottle

Pustulent (sp?)

Spatula

Yoghurt (but only pronounced when the 'yog' rhymes with 'log')

and last but not least...

Scrotum

Edit : Oh and 'Mash' - as in the movie the Toxic Avenger when Toxie says 'Everyday, I go out, and I MASH people!!'

Revenant
Brickbat
Skint

Indeed

pithy
pithy
pithy
pithy
pithy
pithy
pithy
pithy
pithy

and uncouth

Concupiscence
Diremption
Cadaver
Mordant
Moribund
Laminal
Apposite
Tendentious
Circuitous

Are some that've been flicking my switches of late.

Desultory
Ergo
Quadraphonic
Futurist
Autocracy
Wireless

To loath
Heat
Damage
Chalk
Taste


Random words I think are cool.

cuntestry

Decay

preposterous
vandal
lacrimosa
raga

Phlegmatic

Alphabet
Philippic
Absurd
Partake
Stipend
Pharaoh
Lobstertainment
Obscene

Auf Wiedersehen
And I like using German words instead of their English equivalents - Ja, Nein, and when counting.

tebej (fuck)