pinger vs pulse generator

pinger and pulse generator both are nouns.

Word	Noun	Adjective	Verb	Adverb
pinger	Yes	No	No	No
pulse generator	Yes	No	No	No

As nouns, pulse generator is a hypernym of pinger; that is, pulse generator is a word with a broader meaning than pinger:

pinger: a pulse generator used for echo sounding in sonar
pulse generator: a generator of single or multiple voltage pulses; usually adjustable for pulse rate

pinger (noun)	pulse generator (noun)
a pulse generator used for echo sounding in sonar	a generator of single or multiple voltage pulses; usually adjustable for pulse rate