Features, facets (7)
I believe the answer is:
aspects
I believe this is a double definition.
'features' is the first definition.
(aspect is a kind of feature)
'facets' is the second definition.
('aspect' can be a synonym of 'facet')
(Other definitions for aspects that I've seen before include "Views, vistas or facets" , "Points of view" , "'Appearances, facets (7)'" , "Appearance, facet" , "Elements; views" .)