Notice the similarity!

[RBS]

(colors of red) All the Stooges

The Burj
Tai Pei 101
Petronas
Sears

[jack]

They are all colors

Larry
Shemp
Curly Joe
Moe
Curly

[RBS]

languages spoken in India

persimmon
vermilion
scarlet
cerise
puce

[bhavit]

they all are of green colour

hindi
tamil
telugu
punjabi
malayalam

[Vitpat]

they all contain things


crocodile
tree
cactus
money

[Evita]

OK, here's the next one.

duffle bag
wallet
tupperware
basket
garbage can

[Vitpat]

The real answer is they are all upgrades but since that is a valid answer you need to post the next list.

Remember: The answer doesn't have to be what the poster was thinking it just has to be a valid one!

[Evita]

You have to pay for all of them?

[Vitpat]

Since it's been over a week the answer is

they all have a horn/spike

next list:

high-speed
satellite
+100 "whenever" minutes
membership

[Vitpat]

I think they are all tv shows and movies.



Goat
bull
Giraffe
rhino
swordfish

(besides all animals)

[gh1]

The Go! Team - is the similarity i see

[Hugo_Smith]

Riddles.

Junior Kickstart
Doing It Right
Universal Speech
Ladyflash
My World
(I am gonna post this until someone gets a real similarity)

[gh1]

XETAS spells texas

K&M's
neutral
QWYZZLE
99
EQ

[RBS]

I will post since we have the answer now.

AILFORD
ALEEWARD
OZARNIA
XETAS

[gh1]

it's only that the first letter of each word starts with the last half of the alphabet