tense vs nervy

tense is a noun but nervy is not a noun.

Word	Noun	Adjective	Verb	Adverb
tense	Yes	Yes	Yes	No
nervy	No	Yes	No	No

tense (noun)	nervy (noun)
a grammatical category of verbs used to express distinctions of time

tense (adjective)	nervy (adjective)
taut or rigid; stretched tight	showing or requiring courage and contempt of danger
pronounced with relatively tense tongue muscles (e.g., the vowel sound in `beat')	offensively bold
in or of a state of physical or nervous tension	being in a tense state

tense (verb)	nervy (verb)
cause to be tense and uneasy or nervous or anxious
become tense, nervous, or uneasy
increase the tension on
become stretched or tense or taut