Remarkable
Part of speech: adjective
Definition: Worthy of being remarked or noticed; noticeable; conspicuous; hence, uncommon; extraordinary.
Example sentence: Where there's water on Earth, you find life as we know it. So if you find water somewhere else, it becomes a remarkable draw to look closer to see if life of any kind is there, even if it's bacterial, which would be extraordinary for the field of biology.
Significant
Part of speech: adjective
Definition: Signifying something; carrying meaning.Having a covert or hidden meaningHaving a noticeable or major effect; notableReasonably large in number or amountHaving a low probability of occurring by chance (for example, having high correlation and thus likely to be related).
Example sentence: Not many architects have the luxury to reject significant things.