The best replacement for cells is animal cells.

The best alternatives to cells are rated as following:
★★★★★  animal cells
★★★  embryonic stem cells
★★★  eukaryotic cells
★★★  normal cells
★★★  plant cells
★★★  atoms
★★  neurons
★★  viruses
★★  white blood cells
★★  batteries
★★  adult stem cells
★  cancer cells
★  gametes
★  damage bone marrow
★  range vba
★  eukaryotic
★  hemoglobin within red blood cells
★  trichomonas
★  bone marrow cells
★  whole blood
★  bacteria
★  t cells
  das
  prokaryotic
  solar panels
  cancer
  red blood cells
  erythrocytes
  virus-infected cells are __ cells
  oligodendrocytes
  bone marrow
  embryonic
  t lymphocytes
  tissue
  supercedure cells
  prokaryotic cells
  neuroglia
  somatic cells
  b cells
  autosomes
  animal cell
  polycrystalline
  platelets
  packets
  basophils
  non tabbed

Your alternative for cells is not listed? Suggest!
Speaking about cells, one probably shouldn't forget about mitochondria.

Other search terms related to cells and their ratings are:
★★★★★ mitochondria
★★ atp
chloroplasts
membrane bound structures
embryos
You have in mind a companion for cells and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of cells in all years. Click on graph for more.
cells
animal cells
embryonic stem cells