MILITANT
competitive, militant
(adjective) showing a fighting disposition; “highly competitive sales representative”; “militant in fighting for better wages for workers”; “his self-assertive and ubiquitous energy”
belligerent, militant, war-ridden, warring
(adjective) engaged in war; “belligerent (or warring) nations”
militant, hawkish, warlike
(adjective) disposed to warfare or hard-line policies; “militant nations”; “hawkish congressman”; “warlike policies”
militant, activist
(noun) a militant reformer
Source: WordNet® 3.1
Etymology
Adjective
militant (comparative more militant, superlative most militant)
Fighting or disposed to fight; belligerent, warlike. [from 15th c.]
Aggressively supporting of a political or social cause; adamant, combative. [from 17th c.]
Synonyms
• warrish
Noun
militant (plural militants)
(obsolete) A soldier, a combatant. [17th-19th c.]
An entrenched or aggressive adherent to a particular cause, now especially a member of a particular ideological faction. [from 19th c.]
Specifically, someone who supports the Trotskyist political view expressed in the newspaper Militant, or who engages in aggressive left-wing politics. [from 20th c.]
Source: Wiktionary
Mil"i*tant, a. Etym: [L. militans, -antis, p. pr. of militare to be
soldier: cf. F. militant. See Militate.]
Definition: Engaged in warfare; fighting; combating; serving as a soldier.
– Mil"i*tant*ly, adv.
At which command the powers militant... Moved on in silence. Milton.
Church militant, the Christian church on earth, which is supposed to
be engaged in a constant warfare against its enemies, and is thus
distinguished from the church triumphant, in heaven.
Source: Webster’s Unabridged Dictionary 1913 Edition