Their words are not friendly and contradict their actions.

Change the word contradict in the sentence and replace it with something that means the same andthe sentence must still make sense.

Their words are not friendly and conflict with their actions.

Not conflict, use another word

Their words are not friendly and belie their actions.

Not belie, use another word

Their words are not friendly and go against their actions.

Not against, use another word

Their words are not friendly and undermine their actions.