The following info is old and no longer accurate. This is a snap-shot taken June 2000 of domain name availability of English words.

a.com	a.org	a.net
b.com	b.org	b.net
c.com	c.org	c.net
d.com	d.org	d.net
e.com	e.org	e.net
f.com	f.org	f.net
g.com	g.org	g.net
h.com	h.org	h.net
i.com	i.org	i.net
j.com	j.org	j.net
k.com	k.org	k.net
l.com	l.org	l.net
m.com	m.org	m.net
n.com	n.org	n.net
o.com	o.org	o.net
p.com	p.org	p.net
q.com	q.org	q.net
r.com	r.org	r.net
s.com	s.org	s.net
t.com	t.org	t.net
u.com	u.org	u.net
v.com	v.org	v.net
w.com	w.org	w.net
x.com	x.org	x.net
y.com	y.org	y.net
z.com	z.org	z.net