articulate

(adjective, verb)

effective; distinct

blighted

(adjective; verb)

impaired; suffering from a disease

coalesce

(verb)

combine; fuse

contentious

(adjective)

quarrelsome; controversial or touchy in a difficult way

concede

(verb)

admit; yield

diligence

(noun)

steadiness of effort; persistent hard work

endorse

(verb)

approve; support

pretentious

(adjective)

ostentatious; pompous; making unjustified claims; overly ambitious

ratify

(verb)

approve formally; confirm; verify

surreptitous

(adjective)

secret; furtive; sneaky; hidden

tenacity

(noun)

firmness; persistence

viable

(adjective)

practical or workable; capable of maintaining life