
1) Simple phobia
Found on
https://www.crosswordclues.com/clue/claustrophobia

Claustrophobia (from Latin claustrum `a shut in place` and Greek φόβος, phóbos, `fear`) is the fear of having no escape and being in closed or small spaces or rooms (opposite: claustrophilia). It is typically classified as an anxiety disorder and often results in panic attack, and can be the result of many situations or stimuli, includin...
Found on
http://en.wikipedia.org/wiki/Claustrophobia
[Code Lyoko episode] Album cover for Cameo`s She`s Strange (1984) ...
Found on
http://en.wikipedia.org/wiki/Claustrophobia_(Code_Lyoko_episode)

fear of having no escape and being closed in
Found on
http://en.wikipedia.org/wiki/Glossary_of_phobias

fear of closed spaces
Found on
http://phrontistery.info/c.html

<psychology> Morbid fear of confined or closed-in places. ... Origin: Gr. Phobos = fear ... (16 Mar 1998) ...
Found on
http://www.encyclo.co.uk/local/20973

(klaws″tro-fo´be-ә) irrational fear of being shut in; fear of enclosed spaces, such as elevators and tunnels.
Found on
http://www.encyclo.co.uk/local/21001

Type: Term Pronunciation: klaws′trō-fō′bē-ă Definitions: 1. A morbid fear of being in a confined place.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=18064

Claustrophobia: An abnormal and persistent fear of closed spaces, of being closed in or being shut in, as in elevators, tunnels, or any other confined space. The fear is excessive (and quite common). The word 'claustrophobia' is an amalgam made from the Latin 'claudere', to shut + the Greek 'phobis', fear.
Found on
http://www.medterms.com/script/main/art.asp?articlekey=9951

Claustrophobia is the fear of being closed in or of being in a confined space.
Found on
http://www.probertencyclopaedia.com/browse/EC.HTM

[
n] - a morbid fear of being closed in a confined space
Found on
http://www.webdictionary.co.uk/definition.php?query=claustrophobia

fear of being confined in an enclosed or crowded space
Found on
https://www.encyclo.co.uk/local/20875
noun a morbid fear of being closed in a confined space
Found on
https://www.encyclo.co.uk/local/20974

Phobia involving fear of enclosed spaces
Found on
https://www.encyclo.co.uk/local/21221

an abnormal fear of being in enclosed or narrow places.
Found on
https://www.infoplease.com/dictionary/claustrophobia
No exact match found.