No, "disagree" is not a synonym of "heed." "Disagree" means to have a different opinion or belief, while "heed" means to pay attention to or take notice of something.

No. Heed means to pay attention to or listen to. If you heed someones advice you listen to it and perhaps even pay attention to it. Ignore would be an antonym of heed. Disagree is an antonym of agree.

Yes, heed means to pay attention to, or take notice of.

To heed is to pay very close, careful, attention, to another. Also, to take notice of such of this individual. To heed a brother Masonic is to notice and pay very close attention to him, his beliefs, life, and actions.

notice