Adjectives

(s)blunt, crude, starkdevoid of any qualifications or disguise or adornment“the blunt truth”, “the crude facts”, “facing the stark reality of the deadline”
(s)austere, severe, stark, sternseverely simple“a stark interior”
(s)starkcomplete or extreme“stark poverty”, “a stark contrast”
(s)arrant, complete, consummate, double-dyed, everlasting, gross, perfect, pure, sodding, stark, staring, thorough, thoroughgoing, utter, unadulteratedwithout qualification; used informally as (often pejorative) intensifiers“an arrant fool”, “a complete coward”, “a consummate fool”, “a double-dyed villain”, “gross negligence”, “a perfect idiot”, “pure folly”, “what a sodding mess”, “stark staring mad”, “a thorough nuisance”, “a thoroughgoing villain”, “utter nonsense”, “the unadulterated truth”
(s)bare, barren, bleak, desolate, starkproviding no shelter or sustenance“bare rocky hills”, “barren lands”, “the bleak treeless regions of the high Andes”, “the desolate surface of the moon”, “a stark landscape”

Adverbs

(r)starkto the fullest degree“stark mad”, “mouth stark open”