Synonyms of the word 
INDOOR → INTERIOR
indoor
- adj. Situated in, or designed to be used in, or carried on within the interior of a building.
interior
- adj. Within any limits, enclosure, or substance; inside; internal; inner.
- adj. Remote from the limits, frontier, or shore; inland.
- n. The inside of a building, container, cavern, or other enclosed structure.
- n. The inside regions of a country, distanced from the borders or coasts.
- n. (mathematics, topology) The set of all interior points of a set.
If you are interested in words, visit the following sites :
- wiktionary.org/indoor For complete definition of a word
- 1word.ws/indoor to play with words, suffixs, prefixs, etc.