lesson vs golf lesson

lesson and golf lesson both are nouns.

Word	Noun	Adjective	Verb	Adverb
lesson	Yes	No	No	No
golf lesson	Yes	No	No	No

As nouns, golf lesson is a hyponym of lesson; that is, golf lesson is a word with a more specific, narrower meaning than lesson:

Other hyponyms of lesson include language lesson, dance lesson, music lesson, tennis lesson.

lesson (noun)	golf lesson (noun)
a task assigned for individual study	a lesson in playing golf
a unit of instruction
punishment intended as a warning to others
the significance of a story or event