dropkicker vs kicker

dropkicker and kicker both are nouns.

Word	Noun	Adjective	Verb	Adverb
dropkicker	Yes	No	No	No
kicker	Yes	No	No	No

As nouns, kicker is a hypernym of dropkicker; that is, kicker is a word with a broader meaning than dropkicker:

dropkicker: a football kicker who drops the ball and kicks it just as it reaches the ground
kicker: a player who kicks the football

dropkicker (noun)	kicker (noun)
a football kicker who drops the ball and kicks it just as it reaches the ground	a player who kicks the football