Is 'securative' actually not a word? And if so what could I use instead?

I've heard it hundreds of times but everywhere I type it it just keeps trying to go to secretive. Yet I've heard it so many times in things like 'securative measures' and 'securative means'. I'm trying to use it in a phrase it in 'securative defense measures' and 'security... show more I've heard it hundreds of times but everywhere I type it it just keeps trying to go to secretive. Yet I've heard it so many times in things like 'securative measures' and 'securative means'.

I'm trying to use it in a phrase it in 'securative defense measures' and 'security defense measures' or 'secure defense measures' sounds no where near right and can't possibly be correct
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