class;  level;  stratum;  layer;  hierarchy
 very;  extremely;  extreme;  excessive;  splendid;  impressive
 bottom layer;  undermost layer;  lowest (societal) class;  bottom (economic) stratum;  lowest caste
 lower layer;  layer beneath;  lower strata (classes)
 upper stratum (classes, stories, storeys);  upper layer;  layer above
 middle part;  medium depth (water);  medium layer;  medium-size;  mid-level;  medium-rise (building)
 high-rise (building);  multistory;  multistoried;  high (altitude);  upper (atmosphere, air current, etc.)
 laminating;  lamination layer
 clientele;  customer stratum
 stratum;  geological formation;  layer;  bed (coal, gravel, etc.)
 fault;  dislocation;  gap;  discrepancy
 age range;  age-group;  age bracket
 low-rise (architecture);  low-level;  low-class
 underclasses;  poorest segment of the population;  the poor
 multistoried;  multilayered
 readership;  target audience (of a magazine)
 extreme height;  high-rise (i.e. building)
 multi-layered;  multi-tiered;  multi-storied
 base support (e.g. for a party in an election);  substrate;  load bearing layer;  supporting layer
 housewife demographic;  housewives
 purchasers;  customer base;  market (for a product)
 fatty layer;  layer of fat
 low income group;  low income class
 intellectuals;  intelligentsia;  educated class
 base layer;  substratum;  binder course
 customer base;  constituency;  customer segment;  patron base;  clientele
 lower classes;  proletariat;  underclass
 layer of clay;  clay stratum
 unaffiliated voters;  floating voters;  swinging voters
 alluvium;  alluvial stratum
 monolayer;  single layer;  single story (storey)
 layering;  stratification;  sheafification
 medium and high-rise (buildings, apartments, etc.)
 diluvium;  diluvial formation
 climax (rhetoric);  gradation
 lithological layer;  rock strata;  rock formation
 cambium layer;  formative layer
 permeable layer;  pervious layer
 stratum corneum;  horny layer;  cornified layer
 management level;  job level
 succession of strata;  stratigraphy
 granular layer;  stratum granulosum
 atomic layer epitaxy;  ALE;  atomic layer deposition;  ALD
 overstory (overstorey);  canopy layer;  tree stratum
 stratification;  classification;  (data) distribution
 bottom water (depth: 4000+ meters)
 many a little makes a mickle;  every little helps; (lit.) the tower of nine storeys (stories) rose from a small heap of earth
 destitute poor class;  the extremely poor;  people below the poverty line