Uniform showing rank (5)
I believe the answer is:
level
I believe this is a double definition.
'uniform' is the first definition.
(thesaurus)
'rank' is the second definition.
(level is a kind of rank)
'showing' acts as a link.
(Other definitions for level that I've seen before include "Flat and smooth" , "Regular" , "Palindromic tier?" , "Flatten" , "Palindromically smooth" .)