Here are words widely used in spam comments. Adding them to your moderation list protects your site from spam trackback and comments. Just copy-paste this list in your wp-admin/options-discussions.php (if using WordPress)
What is Moderation ? WordPress Comment moderation allows you to prevent comments to appear on your webiste before your approval. It can be useful for addressing Spam Comment.
How Moderation Works ? A new comment goes through many WordPress tests before appearing below your post. If comment fails one of the test conducted by WordPress then it goes to spam list, where you can approve or trash that particular comment. That’s how comment moderation works.
Akismet is a better option available for WordPress users for blocking Spam Comments.
Following is spam word list (released by WordPress) to add in your WordPress wp-admin/options-discussions.php
-online
4u
adipex
advicer
baccarrat
blackjack
bllogspot
booker
byob
car-rental-e-site
car-rentals-e-site
carisoprodol
casino
casinos
chatroom
cialis
coolcoolhu
coolhu
credit-card-debt
credit-report-4u
cwas
cyclen
cyclobenzaprine
dating-e-site
day-trading
debt-consolidation
debt-consolidation-consultant
discreetordering
duty-free
dutyfree
equityloans
fioricet
flowers-leading-site
freenet-shopping
freenet
gambling-
hair-loss
health-insurancedeals-4u
homeequityloans
homefinance
holdem
holdempoker
holdemsoftware
holdemtexasturbowilson
hotel-dealse-site
hotele-site
hotelse-site
incest
insurance-quotesdeals-4u
insurancedeals-4u
jrcreations
levitra
macinstruct
mortgage-4-u
mortgagequotes
online-gambling
onlinegambling-4u
ottawavalleyag
ownsthis
palm-texas-holdem-game
paxil
penis
pharmacy
phentermine
poker-chip
poze
pussy
rental-car-e-site
ringtones
roulette
shemale
shoes
slot-machine
texas-holdem
thorcarlson
top-site
top-e-site
tramadol
trim-spa
ultram
valeofglamorganconservatives
viagra
vioxx
xanax
zolus