The best replacement for tissue is organ.

The best alternatives to tissue are rated as following:
★★★★★  organ
★★  tumor
★★  mechanical valve
★★  organ level development
★★  kleenex
★  swedish massage
★  connective tissue
★  mechanical heart valve
★  swedish
★  napkin
★  handkerchief
★  mechanical valve replacement
★  cancer
★  tissues
★  mechanical valves
★  clot
★  mechanical aortic valve
★  granuloma
★  blood clot
★  sports massage
★  organs
★  toilet paper
★  fat tissue
★  breast cancer
  cord blood
  epithelial tissue
  an organ
  adhesions
  smooth muscle
  shiatsu
  lump
  human tissue
  mechanical heart valves
  relaxation massage
  clots
  muscle tissue
  lumps
  animal tissue
  blood clots
  membrane
  organ system
  permanent tissue
  hot stone massage
  fatty tissue

Your alternative for tissue is not listed? Suggest!
Speaking about tissue, one probably shouldn't forget about implantation bleeding.

Other search terms related to tissue and their ratings are:
★★★★★ implantation bleeding
★★★ menstruation
★★★ trabeculae
★★ miscarriage
★★ menstrual blood
★★ period blood
You have in mind a companion for tissue and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of tissue in all years. Click on graph for more.
tissue
organ
tumor