Irresistible
Part of speech: adjective
Definition: Not able to be resisted.
Example sentence: A clever, ugly man every now and then is successful with the ladies, but a handsome fool is irresistible.
Overpowering
Part of speech: verb
Definition: To subdue someone by superior force.
Part of speech: adjective
Definition: That overpowers; so strong as to be overwhelming.
Example sentence: I'm a feminist, but I think that romance has been taken away a bit for my generation. I think what people connect with in novels is this idea of an overpowering, encompassing love - and it being more important and special than anything and everything else.