As a noun heng
is a character (ꜧ), combining an h and an eng, which stands for the hypothetical phoneme in english which includes both [h] and [ŋ] as its allophones.
heng
English
Noun
a character (?), combining an h and an eng, which stands for the hypothetical phoneme in English which includes both [h] and [?] as its allophones.
----
sheng
English
Noun
(
en noun)
A Chinese wind instrument, being a free-reed mouth organ consisting of 13 or more bamboo pipes of various lengths, which are fixed at their bases in a wind chest made from a dried gourd (or, more recently, wood or chrome-plated brass).
----