7-Letter Words Matching L_____M

There are 12 7-letter words that match L_____M. 3 are common words, such as LEFTISM and LEGROOM. A rarer one is LOCKRAM. In this set, R is the most frequent open letter (6 words). 1 words contain a doubled letter.

Full list 12

leftismlegroomlithiumlabarumladanumlobwormlocoismlugwormlustrumlaicismlehayimlockram

About this list

Words
12 (3 common words)
Common example
leftism
Rare example
lockram
Doubled letters
1
Ending in S
0
Most frequent letter
R (6)

Questions

How many 7-letter words matching l_____m are there?

12. 3 of them are common words.

What is a common example?

LEFTISM is among the common words in this set.