aster / astur [ˈæstər]
aster – n. – any composite plant of the genus Aster with bright daisy-like flowers
astur – n. – a hawk or goshawk, the genus consisting of goshawks and sometimes considered a subgenus of Accipiter
Memonic device – A simple way to keep from confusing these two is to look closely at the spelling. The one with the ‘e’ is ‘earth-bound’. The one with the ‘u’ likes to soar up into the open sky. Plant versus bird.