121.
122. a. For γίγᾱς (from γιγγαντ-ς) and ὀδούς (from ὀδοντ-ς) see § 53 and § 28.b; so in the dative plural.
b. But many stems in -οντ form the nominative singular as in λέων, omitting -ς, dropping -τ-, and lengthening -ο- to -ω-.
123. All noun stems in -ντ are masculine.