synodic month vs lunar month

synodic month and lunar month both are nouns.

Word	Noun	Adjective	Verb	Adverb
synodic month	Yes	No	No	No
lunar month	Yes	No	No	No

As nouns, synodic month and lunar month are synonyms defined as:

synodic month and lunar month: the period between successive new moons (29.531 days)

Other synonyms of synodic month include lunation, moon.

synodic month (noun)	lunar month (noun)
the period between successive new moons (29.531 days)	the period between successive new moons (29.531 days)