Thesaurus.com
Dictionary.com
Definitions

exterior

[ik-steer-ee-er] / ɪkˈstɪər i ər /
ADJECTIVE
outside
Synonyms
STRONGEST
external outdoor outer
STRONG
extraterrestrial over peripheral surface
WEAK
exoteric extraneous extraterritorial extrinsic foreign marginal outermost outlying outmost outward superficial
Antonyms
STRONG
central
WEAK
interior middle
NOUN
visible part
Synonyms
STRONGEST
coating facade skin surface
STRONG
appearance aspect cover covering external face finish outside polish rind shell superficies superstratum
WEAK
exteriority
Antonyms
STRONGEST
core interior middle
STRONG
center inside

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.