tug vs struggle

tug and struggle both are nouns.

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

As verbs, struggle is a hypernym of tug; that is, struggle is a word with a broader meaning than tug:

Other hypernyms of tug include contend, fight.

As verbs, struggle is a hypernym of tug; that is, struggle is a word with a broader meaning than tug:

Other hypernyms of tug include fight.

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

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