WordNet sense 1 (stubbornly unyielding):

dogged, dour, pertinacious, unyielding, dogged

WordNet sense 2 (tenaciously unwilling or marked by tenacious unwillingness to yield):

obstinate, stubborn, unregenerate

WordNet sense 3 (good at remembering):

long, retentive, recollective

WordNet sense 4 (sticking together):

coherent

WordNet sense 5 (tending to adhere):

adhesive