lam vs work over

lam is a noun but work over is not a noun.

Word	Noun	Adjective	Verb	Adverb
lam	Yes	No	Yes	No
work over	No	No	Yes	No

As verbs, work over is a hypernym of lam; that is, work over is a word with a broader meaning than lam:

lam: give a thrashing to; beat hard
work over: give a beating to; subject to a beating, either as a punishment or as an act of aggression

Other hypernyms of lam include beat, beat up.

lam (noun)	work over (noun)
a rapid escape (as by criminals)

lam (verb)	work over (verb)
give a thrashing to; beat hard	give a beating to; subject to a beating, either as a punishment or as an act of aggression
flee; take to one's heels; cut and run