signal (n.)
- alarm
- alert
- assembler
- badge
- balefire
- banner
- beacon
- beam
- bell
- bit
- blink
- blinker
- broadcast
- bug
- buoy
- byte
- channel
- character
- characteristic
- clue
- communication
- communications
- compiler
- cue
- data
- decoding
- device
- differentia
- dip
- display
- earmark
- echo
- encoding
- entropy
- error
- extraordinary
- facsimile
- flag
- flare
- flash
- foghorn
- gesture
- give
- glance
- glimmer
- glimmering
- goad
- hail
- half-mast
- hallmark
- heliograph
- hint
- idiosyncrasy
- image
- impetus
- implication
- incitement
- index
- indicant
- indication
- indicator
- individual
- information
- inkling
- innuendo
- insignia
- insinuation
- instructions
- intimation
- keynote
- kick
- leer
- look
- mark
- measure
- message
- motion
- movement
- noble
- nod
- noise
- notable
- note
- nudge
- pass
- peculiarity
- picture
- play
- poke
- prick
- prompt
- property
- radio
- rare
- reading
- redundancy
- reflection
- render
- report
- representation
- representative
- return
- rocket
- salient
- salute
- scent
- seal
- semaphore
- send
- share
- sign
- signature
- singular
- speak
- special
- spoor
- spot
- spur
- stamp
- stimulus
- striking
- suggestion
- superior
- suspicion
- symptom
- tell
- telling
- telltale
- tocsin
- touch
- trace
- track
- trait
- transfer
- unique
- wave
- whisper
- whistle
- wink
- wireless
signal (v.)
- alarm
- alert
- announce
- badge
- beacon
- beam
- beckon
- bell
- bit
- blink
- blinker
- broadcast
- bug
- buoy
- channel
- character
- clue
- communicate
- convey
- cue
- dip
- display
- disseminate
- earmark
- echo
- facsimile
- fantastic
- flag
- flare
- flash
- gesticulate
- gesture
- give
- glance
- glimmer
- goad
- hail
- heliograph
- hint
- image
- impart
- index
- indicate
- keynote
- kick
- leer
- look
- mark
- measure
- message
- motion
- noble
- nod
- noise
- note
- notify
- nudge
- pass
- picture
- play
- poke
- prick
- prompt
- radio
- render
- report
- return
- rocket
- salute
- scent
- seal
- semaphore
- send
- share
- sign
- signalize
- speak
- spot
- spur
- stamp
- superior
- tell
- touch
- trace
- track
- transfer
- transmit
- wave
- whisper
- whistle
- wigwag
- wink
signal (adj.)
- alert
- arresting
- astonishing
- banner
- beam
- bit
- celebrated
- channel
- characteristic
- communicational
- consequential
- conspicuous
- distinctive
- distinguished
- egregious
- eminent
- error
- esteemed
- estimable
- exceptional
- extraordinary
- fabulous
- famous
- fantastic
- flare
- flash
- formidable
- give
- illustrious
- important
- incredible
- individual
- inkling
- mark
- marked
- marvelous
- memorable
- momentous
- noble
- notable
- noteworthy
- noticeable
- outstanding
- pass
- peculiar
- play
- poke
- prestigious
- prominent
- prompt
- radio
- rare
- remarkable
- renowned
- representative
- reputable
- salient
- scent
- seal
- sign
- significant
- significative
- singular
- special
- spot
- striking
- superior
- telegraphic
- telephonic
- telling
- telltale
- track
- trait
- uncommon
- unforgettable
- unique
- unusual
- weighty
- wireless
- wonderful
