swan vs gallivant

swan is a noun but gallivant is not a noun.

Word	Noun	Adjective	Verb	Adverb
swan	Yes	No	Yes	No
gallivant	No	No	Yes	No

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

swan: move about aimlessly or without any destination, often in search of food or employment
gallivant: wander aimlessly in search of pleasure

Other hyponyms of swan include maunder, gad, jazz around.

swan (noun)	gallivant (noun)
stately heavy-bodied aquatic bird with very long neck and usually white plumage as adult

swan (verb)	gallivant (verb)
to declare or affirm solemnly and formally as true	wander aimlessly in search of pleasure
move about aimlessly or without any destination, often in search of food or employment
sweep majestically