List of alphanumeric vals from Pervasives module.

pervasives.ml

abs
abs_float
acos
asin
at_exit
atan
atan2
bool_of_string
ceil
char_of_int
classify_float
close_in
close_in_noerr
close_out
close_out_noerr
compare
cos
cosh
decr
epsilon_float
exit
exp
expm1
failwith
float
float_of_int
float_of_string
floor
flush
flush_all
format_of_string
frexp
fst
ignore
in_channel_length
incr
infinity
input
input_binary_int
input_byte
input_char
input_line
input_value
int_of_char
int_of_float
int_of_string
invalid_arg
ldexp
lnot
log
log10
log1p
max
max_float
max_int
min
min_float
min_int
mod_float
modf
nan
neg_infinity
not
open_in
open_in_bin
open_in_gen
open_out
open_out_bin
open_out_gen
out_channel_length
output
output_binary_int
output_byte
output_char
output_string
output_value
pos_in
pos_out
pred
prerr_char
prerr_endline
prerr_float
prerr_int
prerr_newline
prerr_string
print_char
print_endline
print_float
print_int
print_newline
print_string
raise
read_float
read_int
read_line
really_input
ref
seek_in
seek_out
set_binary_mode_in
set_binary_mode_out
sin
sinh
snd
sqrt
stderr
stdin
stdout
string_of_bool
string_of_float
string_of_format
string_of_int
succ
tan
tanh
truncate

I think all of these should be syntax highlighted.