Here's my entry at 113, note that all we pass is the wordlist and the key to search for: 
sub num{
$k=shift;for(@_){chomp;$n=lc;$n=~y/abcdefghijklmnopqrstuvwxyz/22233344
+455566677778889999/;push@{$h{$n}},$_;$h{$k}
}

[download]
Update: I believe that I can add 5 (score:118) and get all possibilities. 
sub num{
#23456789_123456789_123456789_123456789_123456789_123456789_123456789_
+123456789_123456789_123456789_123456789_12345678
$k=shift;for(@_){$n=$_;chomp;lc;y/abcdefghijklmnopqrstuvwxyz/222333444
+55566677778889/;push@{$h{$k}},$n if$k=~$_}$h{$k}
}

[download]
Update #2: Now down to 107 with all possibilities, now returns an array instead of ref to array 
sub num{
$k=shift;for(@_){chomp;lc;$n=$_;y/abcdefghijklmnopqrstuvwxyz/222333444
+55566677778889/;push@h,$n if$k=~$_}@h
}

[download]
Returns a reference to all single words found.
ie: pass it 7825 and /usr/dict/words and it will return pub,puck,qua,rub,sub,suck etc.. (not including single letters).

In reply to Re: (Golf) mobile phone numbers - words by the_slycer
in thread (Golf) mobile phone numbers -> words by mischief

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