struggle vs tug

struggle and tug both are nouns.

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

As verbs, tug is a hyponym of struggle; that is, tug is a word with a more specific, narrower meaning than struggle:

As verbs, tug is a hyponym of struggle; that is, tug is a word with a more specific, narrower meaning than struggle:

Other hyponyms of struggle include drive, labor, labour, push, flounder.

struggle (noun)	tug (noun)
strenuous effort	a sudden abrupt pull
an energetic attempt to achieve something	a powerful small boat designed to pull or push larger ships
an open clash between two opposing groups (or individuals)

struggle (verb)	tug (verb)
be engaged in a fight; carry on a fight	struggle in opposition
to exert strenuous effort against opposition	pull hard
climb awkwardly, as if by scrambling	pull or strain hard at
make a strenuous or labored effort	move by pulling hard
	carry with difficulty
	tow (a vessel) with a tug
	strive and make an effort to reach a goal