The best replacement for data warehouse is data mart.

The best alternatives to data warehouse are rated as following:
★★★★★  data mart
★★★★  database
★★  data mining
★★  oltp
★★  business intelligence
★  big data
★  transactional database
★  olap
★  hadoop
★  operational data store
★  erp
★  data store
★  mdm
★  cube
★  operational database
★  data repository
★  master data management
★  enterprise data warehouse
  etl
  ods
  relational database
  traditional database
  bi
  transaction
  repository
  operational data

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Speaking about data warehouse, one probably shouldn't forget about olap.

Other search terms related to data warehouse and their ratings are:
★★★★★ olap
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data warehouse
data mart
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