tug vs tugger

tug and tugger both are nouns.

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

tug (noun)	tugger (noun)
a sudden abrupt pull	someone who pulls or tugs or drags in an effort to move something
a powerful small boat designed to pull or push larger ships

tug (verb)	tugger (verb)
struggle in opposition
pull hard
pull or strain hard at
move by pulling hard
carry with difficulty
tow (a vessel) with a tug
strive and make an effort to reach a goal