COLONNADE
arcade, colonnade
(noun) a structure composed of a series of arches supported by columns
colonnade
(noun) structure consisting of a row of evenly spaced columns
Source: WordNet® 3.1
Etymology
Noun
colonnade (plural colonnades)
A series of columns at regular intervals.
A peristyle.
A portico or stoa.
A regular row of anything, such as trees.
Source: Wiktionary
Col`on*nade", n. Etym: [F. colonnade, It. colonnata, fr. colonna
column. See Colonel.] (Arch.)
Definition: A series or range of columns placed at regular intervals with
all the adjuncts, as entablature, stylobate, roof, etc.
Note: When in front of a building, it is called a portico; when
surrounding a building or an open court or square, a peristyle.
Source: Webster’s Unabridged Dictionary 1913 Edition