Nouns

(n)ranka row or line of people (especially soldiers or police) standing abreast of one another“the entrance was guarded by ranks of policemen”
(n)rankrelative status“his salary was determined by his rank and seniority”
(n)rank and file, rankthe ordinary members of an organization (such as the enlisted soldiers of an army)“the strike was supported by the union rank and file”, “he rose from the ranks to become a colonel”
(n)social station, social status, social rank, rankposition in a social hierarchy“the British are more aware of social status than Americans are”
(n)membership, rankthe body of members of an organization or group“they polled their membership”, “they found dissension in their own ranks”, “he joined the ranks of the unemployed”

Verbs

(v)ranktake or have a position relative to others“This painting ranks among the best in the Western World”
(v)rate, rank, range, order, grade, placeassign a rank or rating to“how would you rank these students?”, “The restaurant is rated highly in the food guide”
(v)rank, outranktake precedence or surpass others in rank

Adjectives

(s)rankvery fertile; producing profuse growth“rank earth”
(s)rankvery offensive in smell or taste“a rank cigar”
(s)crying, egregious, flagrant, glaring, gross, rankconspicuously and outrageously bad or reprehensible“a crying shame”, “an egregious lie”, “flagrant violation of human rights”, “a glaring error”, “gross ineptitude”, “gross injustice”, “rank treachery”
(s)absolute, downright, out-and-out, rank, right-down, sheercomplete and without restriction or qualification; sometimes used informally as intensifiers“absolute freedom”, “an absolute dimwit”, “a downright lie”, “out-and-out mayhem”, “an out-and-out lie”, “a rank outsider”, “many right-down vices”, “got the job through sheer persistence”, “sheer stupidity”
(s)rankgrowing profusely“rank jungle vegetation”