The act of sex has many flavors and emotions, but it's always (forgive me for I'm about to pun) hard to find a useful word to replace the rather common thrust. Below is a list we (some writer friends and I) came up with thanks to the application of much suntan oil and the imbibing of many mudslides. I've left them all in the present tense for ease in use!
Attack
Bang
Bore
Collide
Conquer
Cram
Crush
Dominate
Drill
Drive
Enter
Force
Glide
Grind
Ground
Hammer
Impale
Insert
Jam
Lance
Mash
Master
Mount
Move
Nail
Own
Penetrate
Pierce
Pin
Piston
Plunge
Poke
Possess
Pound
Press
Prod
Propel
Pulverize
Pummel
Pump
Push
Ram
Shove
Slide
Spear
Spike
Spit
Stab
Stick
Stroke
Thrust
Wedge