union·ize /'yü-nyə-ˌnīz/ vb -ized, -iz·ing
vt: to organize into a labor union
to prevent them from unionizing the employees; also: to establish a labor union in
a unionized shop
vi: to form or join a labor union
union·i·za·tion /ˌyü-nyə-nə-'zā-shən/ n
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.