noun. One who blocks: used specifically in hat-making, shoemaking, book-binding, etc.

noun. A blocking-tool or -machine.

noun. Agent noun of block; something that blocks something specific.

noun. a football player whose responsibility is to block players attempting to stop an offensive play

noun. a class of drugs that inhibit (block) some biological process

"Scent blocker is not needed when squirrel hunting; what you do need is a way to slip through the woods as quietly as possible, the best advice I can give you is walk slowly and watch your step."

alpha-blocker  beta-blocker  sun blocker  

football player  footballer  

Fokker  clocker  cocker  crocker  docker  

activator  agonist  analgesia  andis  bronchodilator