crawler vs goody-goody

crawler and goody-goody both are nouns.

Word	Noun	Adjective	Verb	Adverb
crawler	Yes	No	No	No
goody-goody	Yes	Yes	No	No

As nouns, goody-goody is a hyponym of crawler; that is, goody-goody is a word with a more specific, narrower meaning than crawler:

crawler: a person who tries to please someone in order to gain a personal advantage
goody-goody: a person who behaves extremely well in order to please a superior

Other hyponyms of crawler include apple polisher, bootlicker, fawner, groveler, groveller, truckler.

crawler (noun)	goody-goody (noun)
terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers	a person who behaves extremely well in order to please a superior
a person who tries to please someone in order to gain a personal advantage
a person who crawls or creeps along the ground

crawler (adjective)	goody-goody (adjective)
	affectedly or smugly good or self-righteous