The Collaborative International Dictionary of English v.0.48:

Encircle \En*cir"cle\, v. t. [imp. & p. p. Encircled; p. pr. &
   vb. n. Encircling.] [Pref. en- + circle: cf. OF.
   encercler.]
   To form a circle about; to inclose within a circle or ring;
   to surround; as, to encircle one in the arms; the army
   encircled the city.
   [1913 Webster]

         Her brows encircled with his serpent rod. --Parnell.

   Syn: To encompass; surround; environ; inclose.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

enclosed \enclosed\ adj.
   surrounded or closed in, usually on all sides. Opposite of
   unenclosed. [Narrower terms: basined; capsulate,
   capsulated; closed, closed in(predicate); coarctate;
   confined, fenced in, penned; embedded, fixed; embedded,
   surrounded; encircled; enveloped; fogbound;
   self-enclosed; surrounded, encircled]
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

encircled
    adj 1: confined on all sides; "a camp surrounded by enemies";
           "the encircled pioneers" [syn: surrounded, encircled]

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "encircled":
   begirt, belted, cinctured, circled, circumscribed, circumscript,
   defined, definite, delimited, demarcated, determinate, determined,
   encinctured, fixed, girdled, girt, hedged about, ringed, set,
   specific, stated, surrounded, zoned