hubby vs partner

hubby and partner both are nouns.

Word	Noun	Adjective	Verb	Adverb
hubby	Yes	No	No	No
partner	Yes	No	Yes	No

As nouns, partner is a hypernym of hubby; that is, partner is a word with a broader meaning than hubby:

Other hypernyms of hubby include adult male, man, better half, married person, mate, spouse.

hubby (noun)	partner (noun)
a married man; a woman's partner in marriage	an associate in an activity or endeavor or sphere of common interest
	a person's partner in marriage
	a person who is a member of a partnership

hubby (verb)	partner (verb)
	provide with a partner
	act as a partner