bastardly vs spurious

bastardly and spurious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
bastardly	No	Yes	No	No
spurious	No	Yes	No	No

As adjectives, bastardly and spurious are synonyms defined as:

Other synonyms of bastardly include misbegot, misbegotten.

bastardly (adjective)	spurious (adjective)
of no value or worth	false or fake; not what it appears to be
born out of wedlock	plausible but false
	born out of wedlock
	ostensibly valid, but not actually valid