puller vs tugger

puller and tugger both are nouns.

Word	Noun	Adjective	Verb	Adverb
puller	Yes	No	No	No
tugger	Yes	No	No	No

As nouns, puller and tugger are synonyms defined as:

puller and tugger: someone who pulls or tugs or drags in an effort to move something

Other synonyms of puller include dragger.

puller (noun)	tugger (noun)
someone who pulls or tugs or drags in an effort to move something	someone who pulls or tugs or drags in an effort to move something
someone who applies force so as to cause motion toward herself or himself