You have your keyword list that says which words searchers are looking for when they search for your web site or your product, yet you may need some inspiration to insert flavor and improve conversion. I have put together some words that I trust will inspire you.
People don't see the same things after they are repetitively exposed to them repeatedly. In online advertising banner blindness is the most identified example. People basically get used to banners that promote something that is not worth their time, therefore they stop notice the banners after some time. The same thing happens with terminology that are used to make us do something.
Hence, you must vary your action terminology occasionally to keep them successful. The problem for most writers is that it is extremely hard to vary the terminology because of old habit.
I have made this list of actions terminology to facilitate you vary terminology occasionally to keep making your web copy effect full.
Here are a few examples on how you can vary simplicity and colloquial vs. normal words.

Indicating Simplicity:
straight-thinking, ordinary, minimum, unadorned, unequivocal, without a hitch, without ornamentation, unpretentious, natural, indisputable, easy to, precise, undemanding, plain, unembellished, unambiguous, clear, uncomplicated, clean, smooth, usual, with both feet on the ground, minimal, sticking to the facts, effortless, down to earth, explicit, straightforward, plain and simple, simple to, unproblematic.

A colloquial word is an informal, often entertaining word or phrase used in everyday conversation. When you use colloquial words, you draw your reader closer because you appear more familiar, more up close and personal instead of fare away.

Be aware that using colloquial words to much to the wrong market segment can have the opposite effect.

Use colloquial words that are understandable to most people with a reasonable familiarity with English. Here are some examples of normal used colloquial words that have found their way to mainstream online communications:

Colloquial vs. Normal words: con vs. deceive, come up for air vs. take a break, make waves vs. cause trouble, laid-back vs. calm and relaxed, glitzy vs. ashionable, bent out of shape vs. become upset, cool vs. great, bummed vs. depressed, blown away vs. greatly impressed, blow a fuse vs. lose your temper, defect vs. glitch, twenty grand vs. $20,000, has deep pockets vs. has a good source of money, keep your cool vs. remain calm, honcho vs. boss, dough vs. money.