Selina,  I'd go back to your submissions and eliminate the 'baloon like', 'bubble like' and whatever else.  There is no issue with you saying bubbles, baloons, flowers etc.   The only issue is when you have something in a textrue or card paper effect that looks like say linen or embroided fabric.  If you've created a card that looks like linen or even say you created it on linen then scanned and saved that to download to GCU, then that card no longer is linen or embroided fabric.  That is the only issue where a customer may be confused as it wouldn't be impossible for a company to produce cards with linen covers or embroided fabric.  Basically if your description could be interpreted to describe the material that a card is made out of, then you would want to clarify that isn't so by stating embroided look, linen like, leather looking or whatever.  
As you describe these three new cards with the baloon looking bubbles with letters inside, then keywords to use would be, baloon, baloons, bubble, bubbles, letter, letters and so on.

Thanks Randall  

I know it seems ridiculous, but people that go to GCU don't always understand that it is an IMAGE, not a hand crafted card, even though it is clear to the rest of us.  It will save alot of trouble and issues in future, and I appreciate GCU's position.  I am one who had an order for an "embossed" cards and I was notified of the issue and was able to go back and add the extra explaination to my cards.  GCU had to deal with the disgruntled customer, not me, and I was really impressed with their attitude with me.  They also bore the financial losss from refunding the cards as per their satisfaction guarantee.  Remember, their goal is to help YOU sell more cards too!