pinnacle

1 ENTRIES FOUND:
pinnacle /ˈpɪnɪkəl/ noun
plural pinnacles
pinnacle
/ˈpɪnɪkəl/
noun
plural pinnacles
Britannica Dictionary definition of PINNACLE
[count]
2 
: the best or most important part of something : the point of greatest success or achievement — usually singular
— often + of
3 
: a tower on the roof of a building that comes to a narrow point at the top