transmittal vs transmitting

transmittal and transmitting both are nouns.

Word	Noun	Adjective	Verb	Adverb
transmittal	Yes	No	No	No
transmitting	Yes	No	No	No

As nouns, transmittal and transmitting are synonyms defined as:

transmittal and transmitting: the act of sending a message; causing a message to be transmitted

Other synonyms of transmittal include transmission.

transmittal (noun)	transmitting (noun)
the act of sending a message; causing a message to be transmitted	the act of sending a message; causing a message to be transmitted