grunt vs oink

grunt and oink both are nouns.

Word	Noun	Adjective	Verb	Adverb
grunt	Yes	No	Yes	No
oink	Yes	No	Yes	No

As nouns, grunt and oink are synonyms defined as:

grunt (noun)	oink (noun)
medium-sized tropical marine food fishes that utter grunting sounds when caught	the short low gruff noise of the kind made by hogs
the short low gruff noise of the kind made by hogs
an unskilled or low-ranking soldier or other worker

grunt (verb)	oink (verb)
issue a grunting, low, animal-like noise	utter a high-pitched cry, characteristic of pigs