I am looking for someone who knows about phobias because I have a phobia
that I don't know the name of. I am scared to death of basements and
crawlspaces, and I will not go into them. I am not claustrophobic and I
don't have a problem with enclosed spaces. But for some reason, I am
scared to death of house basements.

A fear of a certain place is topophobia. Sorry i couldn't be more
help.

is it just have to do with being underneath something?

This is my best guess at your fear:
Achluophobia, Lygophobia, Nyctophobia, Scotophobia - Fear of darkness

could also be this:
Cenophobia - Fear of empty rooms.

Then theres also this one:
Kenophobia - Fear of voids or empty spaces

lol I even found one about my faith lol:
Wiccaphobia - Fear of witches and witchcraft

Anyways here is the site I found a list at:
http://www.aboutphobias.com/phobia_list.html

i'm glad you found that scorpius because i looked them up and was only
getting general phobias. i did find an old ghost story bout something
that actually happened to me.

I don't like crawlspaces, either. I'm convinced that some prior
resident buried a body in them, and I don't want to be the one to find
it...

Well I am just the reverse. I love crawl spaces, basements and caves.
Something about being under ground or nearly(crawl spaces). I have
commonly been under house doing plumbing work and needed to wait after
doing one process before doing another and have dozed off many times.
Most crawl spaces are warm and moist in winter and cool and damp in
summer. Just right for a nap, LOL.

I know exactly how you feel pancelt.. I used to have a paralyzing fear
of basements. What got me over it believe it or not, was the previous
house I owned. It was over 100 yrs old when I bought it and the basement
was something else(eek). But we spruced it up..painting everything nice
and fresh, but that's not what did it. My house was also haunted, but
the spirits were friendly. Everyone said the house always felt warm and
inviting and I think the ghosts that still lived there helped make it
feel that way. Especially cuz the previous owners over the last couple
of decades had let the house go. I think the ghosts were happy to see
ppl fixing it up and taking care of it again. It must have been a
gorgeous house in its day. Anyway, everytime I was in the basement I
never thot about it because I knew that if anything WAS down there, it
was prolly friendly lol. So as strange as it may seem, it was a ghost or
ghosts that helped me get over my fear of basements lol.
It was either that or the sudden traumatic memory of my sister jumping
out of a dark place in our basement when I was about 3 yrs old and
scaring the living hell outta me(she was 15). Maybe something happened
to you in a basement when you were little, or something you saw freaked
the shit outta you. In any event, if you can figure out what caused it,
half the battle is won..gl with your phobia and I hope you can get rid
of it, cuz I really do know how you feel

Im not afraid of the dark or empty places. It is just basements and
crawlspaces.

I don't like basements either. I have gone in them before, but no more
than once. I hate basements, unless they have been refinished...lol... I
don't think of it as a phobia, I just think of it as me not liking
basements.

I don't like basements at all, even if they have been refinished. I am
uncomfortable in a furnace room, but I will still go in them if I have
to, but I will never go into a basement on my own.

I am not afraid of empty rooms Scorpius_Wiccan.

when I was still a very young teenager, my mom got real sick and had to
go to the hospital for a coupla weeks..these friends of ours took me
in(cuz my mom was a single mom at the time) but the only spare room was
in the basement. It was very nicely finished, with a game room and TV
and the whole bit... I still slept with a gun under my pillow lol