crawler vs creeper

crawler and creeper both are nouns.

Word	Noun	Adjective	Verb	Adverb
crawler	Yes	No	No	No
creeper	Yes	No	No	No

As nouns, crawler and creeper are synonyms defined as:

crawler (noun)	creeper (noun)
terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers	any of various small insectivorous birds of the Northern Hemisphere that climb up a tree trunk supporting themselves on stiff tail feathers and their feet
a person who tries to please someone in order to gain a personal advantage	a person who crawls or creeps along the ground
a person who crawls or creeps along the ground	any plant (as ivy or periwinkle) that grows by creeping