群生 (ぐんせい)growing en masse in one location (of plants); living gregariously (of animals); living in flocks, herds, colonies, etc.

growing en masse in one location (of plants)noun (common) (futsuumeishi), noun or participle which takes the aux. verb suru
living gregariously (of animals); living in flocks, herds, colonies, etc.noun (common) (futsuumeishi), noun or participle which takes the aux. verb suru
all animate creationnoun (common) (futsuumeishi)

群生, its kanji, and other words that share them.Open this graph

Kanji in 群生

抜群ばつぐんoutstanding; excellent
群ぐんgroup; bunch
群れむれgroup; crowd
症候群しょうこうぐんsyndrome
群衆ぐんしゅうgroup (of people); crowd
群像ぐんぞうlively group (usu. young people); dynamic bunch
群島ぐんとうisland group; archipelago
一群いちぐんgroup; flock
学生がくせいstudent (esp. a university student)
生活せいかつliving; life (one's daily existence)
生産せいさんproduction; manufacture
人生じんせい(human) life (i.e. conception to death)
先生せんせいteacher; instructor
厚生省こうせいしょうMinistry of Health and Welfare (now Ministry of Health, Labour and Welfare)
年生ねんせいpupil in ... year; student in ... year
新生しんせいrebirth; new birth

See how 群生 connects to the rest of Japanese.