wait vs delay

wait and delay both are nouns.

Word	Noun	Adjective	Verb	Adverb
wait	Yes	No	Yes	No
delay	Yes	No	Yes	No

As nouns, wait and delay are synonyms defined as:

Other synonyms of wait include hold, postponement, time lag.

As verbs, delay is a hyponym of wait; that is, delay is a word with a more specific, narrower meaning than wait:

Other hyponyms of wait include hold out.

wait (noun)	delay (noun)
the act of waiting (remaining inactive in one place while expecting something)	the act of delaying; inactivity resulting in something being put off until a later time
time during which some action is awaited	time during which some action is awaited

wait (verb)	delay (verb)
look forward to the probable occurrence of	cause to be slowed down or delayed
serve as a waiter or waitress in a restaurant	stop or halt
stay in one place and anticipate or expect something	slow the growth or development of
wait before acting	act later than planned, scheduled, or required