PS

*ḥamṯ- - lower belly, uterus, womb (SED I No. 122; Kogan 2011: 217)

Phonetically not without difficulties: only Ugr. and MSA forms definitely point to *-ṯ as the third radical while reflexes in other languages are either not indicative (Akk., Hbr., M. Eth.) or irregular (Arm.).

Akkadian
emšu - hypogastric region (CAD E 153, AHw. 215)
Ugaritic
ḥmṯ - lower belly (DLU 178)
Hebrew
ḥōmäš - belly (HALOT 331)
Syriac
ḥumšā - abdomen, omassum (LSyr. 242)
š points to *š, while t < *ṯ is expected. Probably a Hebraism, see [Degen 1979].
Geez
ḥǝmŝ, ḥəms - uterus, womb, pubes (CDG 234)
ŝ points to *ŝ unless a graphic variant of s (this and other examples of Sem. *ṯ > Gez. ŝ are treated in [Voigt Interdentale 105-6 et passim]).
Tigre
ḥəməs - pubes, abdomen (of men and women) (WTS 61)
Amharic
əms - vulva, vagina (AED 1126)
Argobba
həms - vulva, vagina (AAD 312)
Mehri
ḥamṯ - belly from the navel down (ML 182)
Jibbali
ḥamṯ - lower belly (JL 112)
Harsusi
ḥamṯ - lower belly, pubes (HL 60)
Soqotri
ḥánt - stomach (LS 183)
n < *m before ­t