acute angle(n = noun.shape) - an angle less than 90 degrees but more than 0 degrees;
is a kind of oblique angle

N  angularity, angularness, aduncity, angle, cusp, bend, fold, notch, fork, bifurcation, elbow, knee, knuckle, ankle, groin, crotch, crutch, crane, fluke, scythe, sickle, zigzag, kimbo, akimbo, corner, nook, recess, niche, oriel, coign, right angle, obliquity, angle of 45 degrees, miter, acute angle, obtuse angle, salient angle, reentering angle, spherical angle, angular measurement, angular elevation, angular distance, angular velocity, trigonometry, goniometry, altimetry, clinometer, graphometer, goniometer, theodolite, sextant, quadrant, dichotomy, triangle, trigon, wedge, rectangle, square, lozenge, diamond, rhomb, rhombus, quadrangle, quadrilateral, parallelogram, quadrature, polygon, pentagon, hexagon, heptagon, octagon, oxygon, decagon, pyramid, cone, Platonic bodies, cube, rhomboid, tetrahedron, pentahedron, hexahedron, octahedron, dodecahedron, icosahedron, eicosahedron, prism, pyramid, parallelopiped, curb roof, gambrel roof, mansard roof, angular, bent, crooked, aduncous, uncinated, aquiline, jagged, serrated, falciform, falcated, furcated, forked, bifurcate, zigzag, furcular, hooked, dovetailed, knock kneed, crinkled, akimbo, kimbo, geniculated, oblique, fusiform, wedge-shaped, cuneiform, cuneate, multangular, oxygonal, triangular, trigonal, trilateral, quadrangular, quadrilateral, foursquare, rectangular, square, multilateral, polygonal, cubical, rhomboid, rhomboidal, pyramidal.

acute, acute accent, acute anterior poliomyelitis, acute brain disorder, acute gastritis, acute glaucoma, acute glossitis, acute hemorrhagic encephalitis, acute inclusion body encephalitis, acute kidney failure, acute leukemia, acute lymphoblastic leukemia, acute lymphocytic leukemia, acute myelocytic leukemia, acute myeloid leukemia, acute organic brain syndrome, acute pyelonephritis, acute renal failure, acute schizophrenic episode, acute triangle, angle, angle bracket, angle for, angle iron, angle of attack, angle of dip, angle of entry, angle of extinction, angle of incidence, angle of inclination, angle of reflection, angle of refraction, angle of view, camera angle, critical angle, cutting angle, exterior angle, external angle, extinction angle, face angle, gliding angle, helix angle, hour angle, incidence angle, interior angle, internal angle, oblique angle, obtuse angle, phase angle, plane angle, polyhedral angle, reentering angle, reentrant angle, reflex angle, right angle, round angle, salient angle, severe acute respiratory syndrome, solid angle, spherical angle, straight angle, tilt angle, vertical angle, view angle, wave angle