ἄκρος, -α, -ον [in LXX for קֶצַח, בֹּהֶן, etc. ;] highest, extreme; as subst., τὸ ἄ., the top, extremity: Refs Mrk.13:27, Luk.16:24, Heb.11:21; pl. (cf. MM, VGT, see word), Mat.24:31.† (AS)
Thayer:
1) the farthest bounds, uttermost parts, end, highest, extreme 1a) of the earth 1b) of heaven
ἄκρον
akron
ak'-ron
Neuter of an adjective probably akin to the base of G188; the extremity
KJV Usage: one end . . . other, tip, top, uttermost part.
G196 ἀκριβέστατοςἀκριβέστατος
akribestatos
ak-ree-bes'-ta-tos
Superlative of ἀκριβης akribēs (a derivative of the same as G206); mostexact
KJV Usage: most straitest.
G200 ἀκρίςἀκρίς
akris
ak-rece'
Apparently from the same as G206; a locust (as pointed, or as lighting on the top of vegetation)
KJV Usage: locust.
G203 ἀκροβυστίαἀκροβυστία
akrobustia
ak-rob-oos-tee'-ah
From G206 and probably a modified form of πόσθη posthē (the penis or male sexual organ); the prepuce; by implication an uncircumcised (that is, gentile, figuratively unregenerate) state or person
KJV Usage: not circumcised, uncircumcised [with G2192], uncircumcision.
G204 ἀκρογωνιαῖοςἀκρογωνιαῖος
akrogōniaios
ak-rog-o-nee-ah'-yos
From G206 and G1137; belonging to the extreme corner
KJV Usage: chief corner.
G205 ἀκροθίνιονἀκροθίνιον
akrothinion
ak-roth-in'-ee-on
From G206 and θίς this (a heap); properly (in the plural) the topoftheheap, that is, (by implication) bestofthebooty
KJV Usage: spoils.
G891 ἄχρι, ἄχριςἄχρι, ἄχρις
achri achris
akh'-ree,akh'-rece
Akin to G206 (through the idea of a terminus); (of time) until or (of place) upto
KJV Usage: as far as, for, in (-to), till, (even, un-) to, until, while.
ἀκμήν
akmēn
ak-mane'
Accusative case of a noun (“acme” ) akin to ἀκή akē (a point) and meaning the same; adverbially just now, that is, still
KJV Usage: yet.
G173 ἄκανθαἄκανθα
akantha
ak'-an-thah
Probably from the same as G188; a thorn
KJV Usage: thorn.
G187 ἀκμάζωἀκμάζω
akmazō
ak-mad'-zo
From the same as G188; to makeapoint, that is, (figuratively) mature
KJV Usage: be fully ripe.
G3691 ὀξύςὀξύς
oxus
ox-oos'
Probably akin to the base of G188 (“acid”); keen; by analogy rapid
KJV Usage: sharp, swift.
G5230 ὑπέρακμοςὑπέρακμος
huperakmos
hoop-er'-ak-mos
From G5228 and the base of G188; beyond the “acme”, that is, figuratively (of a daughter) past the bloom (prime) of youth